This file is indexed.

/usr/share/doc/xfig/html/editing.html is in xfig-doc 1:3.2.6a-2.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 3.2//EN">
<html>
<head>
<title>Editing Objects</title>
</head>

<body>
<a href="contents.html"><img src="images/xfig-title.png"
  alt="XFIG Users Manual" border=0></a>

<hr>

<h1>Editing Objects</h1>

The editing Mode Panel is used to perform edit operations
on existing objects,
See also <a href="#select-object">Selecting Objects</a>.
<p>
<dl>

<dt><a href="#glue-compound"><img src="images/glue-compound-button.png"
    align="middle" alt="">
  Glue COMPOUND</a>

<dt><a href="#break-compound"><img src="images/break-compound-button.png"
    align="middle" alt="">
  Break COMPOUND</a>

<dt><a href="#open-compound"><img src="images/open-compound-button.png"
    align="middle" alt="">
  Open COMPOUND temporarily</a>

<dt><a href="#join"><img src="images/join-button.png"
    align="middle" alt="">
  Join/Split Lines/Splines/etc</a>

<dt><a href="#chop"><img src="images/chop-button.png"
    align="middle" alt="">
  Chop Object</a>

<dt><a href="#scale"><img src="images/scale-button.png"
    align="middle" alt="">
  Scale Object</a>

<dt><a href="#align"><img src="images/align-button.png"
    align="middle" alt="">
  Align Objects</a>

<dt><a href="#move-point"><img src="images/move-point-button.png"
    align="middle" alt="">
  Move Point</a>

<dt><a href="#add-point"><img src="images/add-point-button.png"
    align="middle" alt="">
  Add Point</a>

<dt><a href="#delete-point"><img src="images/delete-point-button.png"
    align="middle" alt="">
  Delete Point</a>

<dt><a href="#move"><img src="images/move-button.png"
    align="middle" alt="">
  Move Object</a>

<dt><a href="#copy"><img src="images/copy-button.png"
    align="middle" alt="">
  Copy Object</a>

<dt><a href="#delete"><img src="images/delete-button.png"
    align="middle" alt="">
  Delete Object</a>

<dt><a href="#update"><img src="images/update-button.png"
    align="middle" alt="">
  Update Attributes of Object</a>

<dt><a href="#edit"><img src="images/edit-button.png"
    align="middle" alt="">
  Edit Attributes of Object</a>

<dt><a href="#flip"><img src="images/flip-vert-button.png"
    align="middle" alt="">
<img src="images/flip-horiz-button.png" align="middle" alt="">
  Flip Object Vertically or Horizontally</a>

<dt><a href="#rotate"><img src="images/rotate-cw-button.png"
    align="middle" alt="">
<img src="images/rotate-ccw-button.png" align="middle" alt="">
  Rotate Object</a>

<dt><a href="#spline-line"><img src="images/spline-line-button.png"
    align="middle" alt="">
  Convert SPLINE to/from LINE or BOX to/from ARC-BOX</a>

<dt><a href="#add-arrow"><img src="images/add-arrow-button.png"
    align="middle" alt="">
  Add/Delete Arrows</a>

<dt><a href="#add-tangent"><img src="images/add-tangent-button.png"
    align="middle" alt="">
  Add Tangent or Normal to Curve</a>

<dt><a href="#measure-angle"><img src="images/measure-angle-button.png"
    align="middle" alt="">
  Measure Angle</a>

<dt><a href="#measure-length"><img src="images/measure-length-button.png"
    align="middle" alt="">
  Measure Length of Lines and Arcs, and Perimeters of Circles and Ellipses</a>

<dt><a href="#measure-area"><img src="images/measure-area-button.png"
    align="middle" alt="">
  Measure Area of Polygons and Ellipses</a>

</dl>
<p>

<hr>

<dl>

<dt><img src="images/glue-compound-button.png" alt="">
  <a name="glue-compound"></a>
Glue selected objects and make them a COMPOUND object.
<dd>
<p>
This is useful to <a href="#move">move</a>
or <a href="#copy">copy</a> some objects together at the same time.
It is also possible to scale part of a figure
by <a href="#scale">scaling</a> a COMPOUND object
after making part of the figure COMPOUND.
<p>
Clicking on an object with mouse button 1 (`tag object')
will tag the object.
Clicking one corner of a rectangular region
with mouse button 2 (`tag region')
and then clicking mouse button 2 (`final corner') again
at the opposite corner of the rectangular region
will tag all objects inside the region.
After tagging all objects to be glued into a COMPOUND object,
clicking mouse button 3 (`compound tagged') will
glue those objects and make them a COMPOUND object.
<p>
If an already tagged object is selected by mouse button 1
or mouse button 2, that object will be untagged.
If you want to remove all tags,
change the mode temporarily to any other mode (e.g. &quot;move object&quot;) except BREAK COMPOUND.
<p>
The COMPOUND object may be separated into component objects by
<a href="#break-compound">BREAK COMPOUND</a>.

<hr>

<dt><img src="images/break-compound-button.png" alt="">
  <a name="break-compound"></a>
Break a COMPOUND object into separate component objects.
<dd>
<p>
Clicking a COMPOUND object with mouse button 1 (`break compound')
will break the COMPOUND into separate component objects.
Clicking with mouse button 2 (`break and tag')
will also achieve the same effect,
but it will tag those component objects for re-gluing with
<a href="#glue-compound">GLUE COMPOUND</a> again.
<p>
If you want to edit component objects without breaking the COMPOUND object,
you may open the COMPOUND object temporarily
using <a href="#open-compound">OPEN COMPOUND</a>.

<hr>

<dt><img src="images/open-compound-button.png" alt="">
  <a name="open-compound"></a>
Open a compound object temporarily for editing the component objects.
<dd>
<p>
<p>
Clicking a COMPOUND object with mouse button 1 (`open compound')
will open the COMPOUND object,
and then the component objects may be edited.
All other objects which were not in the COMPOUND object
will become invisible temporarily,
but they will reappear after all COMPOUND objects are closed.
<p>
If mouse button 2 (`open, keep visible') is clicked on the COMPOUND,
the other objects not in the COMPOUND object will become shades of gray,
making it easy to align objects inside the compound with those outside.
<p>
A popup panel with two buttons to close the COMPOUND objects
(<i>Close This Compound</i> and <i>Close All Compounds</i>)
will appear when a COMPOUND object is opened,
and the open COMPOUND may be closed again using those buttons.
Clicking <i>Close This Compound</i> will close the COMPOUND object last opened,
and clicking <i>Close All Compounds</i> will close all nested, opened COMPOUND objects.
<p>
If you want to break a COMPOUND object into component objects,
use <a href="#break-compound">BREAK COMPOUND</a>.
<p>
If the File/Save is attempted while a compound is open, <b>xfig</b>
will ask if you want to save only the open COMPOUND object (Save Part)
or the whole figure (Save All).
<p>
<img src="images/pict-info.png" alt="">
<i>Note</i>:
If you open a COMPOUND object,
<a href="#delete">delete</a> an object in that COMPOUND object,
close the COMPOUND object and
<a href="main_menus.html#undo">Undo</a> the delete operation,
the object you deleted will reappear but it will outside of the COMPOUND object.
Conversely, if you delete an object from the canvas,
open a compound then undo the delete of the original object,
it will now be part of the open compound.
In this way you may add or remove selected objects from a COMPOUND.

<hr>

<dt><img src="images/join-button.png" alt="">
  <a name="join"></a>
Join or split lines
<dd>
<p>
With this feature you may join lines or splines together or split
a line or spline into two objects.  Also, you may close an open line
(make it a polygon) or spline (closed spline) or open a box, polygon
or closed spline.
<p>
To join two lines or two splines together
click mouse button 1 (`Join lines/splines') to select the first endpoint
and again (`Choose next point') to select the second endpoint to be joined.
If the endpoints are on the same line or spline, it will make a closed object.
<p>
To split a line or spline into two separate objects or to convert a box
or polygon to a line, or to open a closed spline,
click mouse button 2 (`Spline line/spline')
between two the points on the line/spline etc.



<hr>

<dt><img src="images/chop-button.png" alt="">
  <a name="chop"></a>
Chopping objects.
<dd>
<p>
The Chop operation allows you to chop polylines, arcs, and circles into
individual objects that, together, approximate the original object.
(Ellipses will be supported in a future release.)
<p>
Left-clicking on one or more objects selects them as "axes".  When another
object is subsequently selected with a middle click, all possible intersections
between that object and all "axe" objects are computed.  These intersections
are then used to create a collection of new objects that approximate the
original.  Additional "axe" objects can be added at anytime, and any number of
objects may be chopped.  Right-clicking clears the axe list.
<p>
Circles will be partitioned into pie-wedge arcs and arcs will be partitioned
into either open or pie-wedge arcs, depending on the type of the original arc.
(In both cases, the type can be changed by editing the newly created objects.)
Open polylines and unconstrained polygons (i.e., closed polylines other than
boxes, arcboxes, and picture boxes) will be chopped into one or more objects of
the same type.  Constrained polygons cannot be chopped.
<p>
How polygons are chopped is controlled by the "Arc Type" mode in the indicator
panel.  If "Open" mode is selected, the polygons that result from the cut
operation will defined only by the vertices of the original polygon and the
intersection points; "Closed" mode will result in polygons that include, in
addition to the original vertices and intersects, the geometric centerpoint of
the  original polygon.
<p>
Chop operations cannot (yet) be undone.



<hr>

<dt><img src="images/scale-button.png" alt="">
  <a name="scale"></a>
Scale object
<dd>
<p>
Clicking any <b>corner</b> of
<a href="drawing.html#box">BOX</a>,
<a href="drawing.html#arc-box">ARC-BOX</a>,
or <a href="editing.html#glue-compound">COMPOUND</a> object
with mouse button 1 (`scale box') and dragging the mouse will
start scaling the object proportionally to its horizontal/vertical ratio.
Clicking any <b>edge</b> of that object
with mouse button 1 (`scale box') will
start scaling the object only in one dimension (width or height).
The scaling operation is finished
by clicking mouse button 1 (`new position') again.
<p>
Clicking on an object with mouse button 2 (`scale about center')
will scale the object proportionally about its center.
The scaling operation is finished
by clicking mouse button 2 (`new position') again.
<p>
In any case, The scaling operation may be canceled
by clicking mouse button 3 (`cancel').
<p>
It is not possible to scale
<a href="drawing.html#text">TEXT</a> objects
directly with this function.
To scale TEXT objects,
use <a href="#edit">EDIT OBJECT</a> or <a href="#update">UPDATE</a>
and change the size of the text
(see <a href="attributes.html#text-size">TEXT SIZE</a>).
However, if a <a href="#glue-compound">COMPOUND</a>
object that includes TEXT objects is scaled,
the TEXT objects will also be scaled
if the <a href="attributes.html#text-flags"><i>Rigid</i> flag</a>
is not set.
<p>
You may use also <a href="#move-point">MOVE POINT</a>
if you want to scale an object such as a BOX
without keeping its horizontal/vertical ratio.

<hr>

<dt><img src="images/align-button.png" alt="">
  <a name="align"></a>
Align objects
<dd>
<p>
How objects are aligned is set by
<a href="attributes.html#vertical-align">VERTICAL ALIGN</a>
and <a href="attributes.html#horiz-align">HORIZONTAL ALIGN</a>.
<p>
Clicking on a <a href="#glue-compound">COMPOUND object</a>
with mouse button 1 (`align compound')
will align objects within the COMPOUND object.
Clicking mouse button 2 (`align canvas') anywhere on the canvas
will align all objects to the canvas.

<hr>

<dt><img src="images/move-point-button.png" alt="">
  <a name="move-point"></a>
Move a point of an object
<dd>
<p>
Select the point to be moved
by clicking the point with mouse button 1 (`move point'),
and finish the move by click mouse button 1 (`new position') again
after moving mouse to the new point.
If you want to restrict the move to horizontal or vertical,
use mouse button 2 (`horiz/vert move') instead of mouse button 1.
The operation may be canceled by clicking mouse button 3 (`cancel')
in either case.
<p>
This may not be used for <a href="drawing.html#text">TEXT</a> objects.
For <a href="drawing.html#box">BOX</a>,
<a href="drawing.html#arc-box">ARC-BOX</a>,
and <a href="editing.html#glue-compound">COMPOUND</a> objects,
not only the selected point
but the edges connected to the point will be moved.
The object created by
<a href="drawing.html#regular-polygon">REGULAR POLYGON</a>
is an ordinary <a href="drawing.html#polygon">POLYGON</a> object,
and only the selected point will be moved.
<p>
Points may also be <a href="#add-point">added</a>
or <a href="#add-point">deleted</a>.
If you want to move entire object, use <a href="#move">MOVE</a> instead.

<hr>

<dt><img src="images/add-point-button.png" alt="">
  <a name="add-point"></a>
Add a new point to a
<a href="drawing.html#polyline">POLYLINE</a>,
<a href="drawing.html#polygon">POLYGON</a>,
or <a href="drawing.html#spline">SPLINE</a> object
<dd>
<p>
Clicking mouse button 1 (`break/add here') between two points of an object
will add a new point at that location,
and the point will move following mouse cursor.
The operation is finished
by clicking mouse button 1 (`place new point') again.
<p>
It is not possible to add a point to
<a href="drawing.html#box">BOX</a> or
<a href="drawing.html#arc-box">ARC-BOX</a> objects.
The object created by
<a href="drawing.html#regular-polygon">REGULAR POLYGON</a>
is an ordinary <a href="drawing.html#polygon">POLYGON</a> object,
and it is possible to add new points anywhere in it.
<p>
Points may also be <a href="#move-point">moved</a>
or <a href="#add-point">deleted</a>.

<hr>

<dt><img src="images/delete-point-button.png" alt="">
  <a name="delete-point"></a>
Delete point from
<a href="drawing.html#polyline">POLYLINE</a>,
<a href="drawing.html#polygon">POLYGON</a>,
or <a href="drawing.html#spline">SPLINE</a> object
<dd>
<p>
Clicking a point to be deleted with mouse button 1 (`delete point')
will delete the point,
and the points on either side of the point will connected directly.
<p>
It is not possible to delete points from a
<a href="drawing.html#box">BOX</a>
or <a href="drawing.html#arc-box">ARC-BOX</a> object.
The object created by
<a href="drawing.html#regular-polygon">REGULAR POLYGON</a>
is ordinary <a href="drawing.html#polygon">POLYGON</a> object,
and it is possible to delete points from it.
<p>
Points may also be <a href="#move-point">moved</a>
or <a href="#add-point">added</a>.

<hr>

<dt><img src="images/move-button.png" alt="">
  <a name="move"></a>
Move object
<dd>
<p>
Select the object to be moved by clicking the object
with mouse button 1 (`move object'),
and finish the move operation by
clicking mouse button 1 (`place object') again at the new position.
If you want to restrict the movement to horizontal or vertical,
use mouse button 2 (`horiz/vert move') instead of mouse button 1.
The operation may be canceled by clicking mouse button 3 (`cancel') in
either case.
<p>
If you want to move several objects at one time,
you may put them into a COMPOUND object
using <a href="#glue-compound">GLUE COMPOUND</a>.
<p>
By setting <a href="attributes.html#smart-link">SMART-LINKS MODE</a>,
it is possible to move the endpoints of lines which touch the object
as you move the object itself.  Additionally, endpoints of lines which
fall inside a COMPOUND object will also be moved.
The SMART-LINKS feature
only works with POLYLINES (not splines) touching a BOX, ARC-BOX, or COMPOUND.
<p>
Objects may also be <a href="#copy">copied</a>
or <a href="#delete">deleted</a>.
If you want to move a point of the object,
use <a href="#move-point">MOVE POINT</a> instead.

<hr>

<dt><img src="images/copy-button.png" alt="">
  <a name="copy"></a>
Copy object
<dd>
<p>
Select the object to be copied by clicking the object
with mouse button 1 (`copy object'),
and finish the copy operation by
clicking mouse button 1 (`place object') again at the position
to place the copy.
If you want to restrict the movement to horizontal or vertical,
use mouse button 2 (`horiz/vert copy') instead of mouse button 1.
The operation may be canceled by clicking mouse button 3 (`cancel')
in either case.
<p>
If you want to copy several objects at the same time,
you may put them a COMPOUND object
using <a href="#glue-compound">GLUE COMPOUND</a>.
<p>
By setting <a href="attributes.html#smart-link">SMART-LINKS MODE</a>,
it is possible to copy the lines which touch the object
as you move the object itself.
This only works with POLYLINES (not splines) touching a BOX or ARC-BOX.
<p>
It is also possible to make many copies in this mode,
using <i>ARRAY PLACEMENT</i>.
To do this, first set the number of copies to be created
by setting <a href="attributes.html#num-x-copies">NUMBER OF X COPIES</a>
and <a href="attributes.html#num-y-copies">NUMBER OF Y COPIES</a>.
Then select the object to be copied by clicking the object
with mouse button 1 (`copy object') or 2 (`constrained copy'),
and specify the direction and distance to place the copies
by clicking mouse button 2 (`array placement') after moving the mouse.
Normally, objects will be placed on the array of
NUMBER OF X COPIES and NUMBER OF Y COPIES,
but when either of them is set 0 or 1,
copies of specified number will be generated
and they can be placed obliquely.  For example, if the number of X copies is 3 and
the number of Y copies is 0 or 1, the copied objects will be placed
along the X direction at the same Y position as the original object.
<p>
Clicking an object with mouse button 3 (`copy to cut buf')
will copy the object to the <i>xfig cut buffer</i>.
The object copied into the <i>xfig cut buffer</i> may be inserted
into the figure on the canvas
using <a href="main_menus.html#paste">Paste Objects</a>.
This allows you to copy part of a figure to another figure.
Any object in the <i>xfig cut buffer</i> will be overwritten
when the new object is copied into the <i>xfig cut buffer</i>.
To copy multiple objects into the <i>xfig cut buffer</i>,
you must first put them into a COMPOUND object
using <a href="#glue-compound">GLUE COMPOUND</a>.
<p>
Objects may also be <a href="#move">moved</a>
or <a href="#delete">deleted</a>.

<hr>

<dt><img src="images/delete-button.png" alt="">
  <a name="delete"></a>
Delete object
<dd>
<p>
Clicking an object with mouse button 1 (`delete object')
will remove the object.
It is also possible to remove objects in a rectangular region
by clicking mouse button 2 (`delete region') at one corner of the region
and then again (`final corner') again at the opposite corner.
<p>
Clicking an object with mouse button 3 (`del to cut buf')
will remove the object from the canvas and move it to the <i>xfig cut buffer</i>.
The object moved into the <i>xfig cut buffer</i> may be inserted
into the figure on the canvas
using <a href="main_menus.html#paste">Paste Objects</a> later.
See also <a href="#copy">COPY</a>.
<p>
If you want to delete all objects from the canvas to make a new figure,
you may use <a href="main_menus.html#new">New</a>.

<hr>

<dt><img src="images/update-button.png" alt="">
  <a name="update"></a>
Update object or attribute panel
<dd>
<p>
Update the attributes (such as line width or colors) of object
with the current settings in the
<a href="attributes.html">Attribute Panel</a>.
Conversely, it is also possible to copy the attributes of an object
to the attribute panel.
<p>
Clicking an object with mouse button 1 (`update object')
will apply the current settings of the attribute buttons selected for UPDATE
to the object.
If a <a href="editing.html#glue-compound">COMPOUND object</a>
is clicked with mouse button 1 (`update object'),
the attributes of all the objects in the COMPOUND object will be updated.
<p>
Clicking an object (except a COMPOUND object)
with mouse button 2 (`update settings')
will copy the attributes of the object to the attribute buttons
which are selected for UPDATE.
This allows you to copy attributes from one object to another object.
<p>
<a name="update-control">In UPDATE mode</a>,
a small toggle button appears in the upper-right corner
of each <a href="attributes.html">attribute button</a>,
and only the attribute buttons whose toggle button is set <i>ON</i>
will be used for update.
Clicking the toggle button at the upper-right corner of an attribute button
will toggle the button <i>ON</i>/<i>OFF</i>.
It is also possible to select, unselect, or toggle all attribute buttons,
using <i>Update Control</i> buttons at the left side of the attribute panel.
<p>
<blockquote>
  <img src="images/update-control.png" alt="[Update Control Buttons]">
</blockquote>
<p>
The attributes of objects may also be modified
using <a href="#edit">EDIT OBJECT</a>.
Some attributes can't be modified by UPDATE but may be modified by EDIT OBJECT.

<hr>

<dt><img src="images/edit-button.png" alt="">
  <a name="edit"></a>
Edit object attributes
<dd>
<p>
Clicking an object with mouse button 1 (`edit object')
will popup the <a href="#edit-panel">Edit Panel</a> to edit the attributes.
The items in the panel depend on the object being edited.
See <a href="#edit-panel">Edit Panel</a> for more information.
<p>
Clicking a control point of a
<a href="drawing.html#spline">SPLINE</a> object
with mouse button 3 (`edit point') will popup
<a href="#edit-point">EDIT POINT panel</a> to
modify the <i>shape factor</i> of the spline curve.
<p>
The attributes of objects may also be modified using <a href="#update">UPDATE</a>,
but some attributes can't be modified with UPDATE.
<p>
<a name="edit-comments"></a>
If mouse button 2 (`edit Fig comments') is clicked on the canvas,
the edit panel will popup to allow the user to change the comments
associated with the whole figure:<br>
<img src="images/edit-figure-comments.png" align=bottom alt="[ Edit Figure Comment ]">
<p>
<a name="display-comments"></a>
If the <b>Shift</b> key is held down while mouse button 2 (`show comments')
is clicked on an object, any comments in the object are displayed
in a popup until the mouse button is released:<br>
<img src="images/show-comments.png" align=bottom alt="[ Show Comment ]">

<hr>

<dt><img src="images/flip-vert-button.png" alt="">
  <img src="images/flip-horiz-button.png" alt="">
  <a name="flip"></a>
Flip object vertically or horizontally
<dd>
<p>
Clicking the object with mouse button 1 (`flip')
will flip the object vertically/horizontally about that point.
Clicking the object with mouse button 2 (`copy &amp; flip')
will make <b>copy</b> of the object flipped vertically/horizontally about that point,
leaving original object as it was.
<p>
It is also possible to set the <i>anchor point</i>
about which the object will be flipped,
by clicking mouse button 3 (`set anchor') at the point.
A crosshair (+) indicates the anchor point on the canvas.
The anchor point may be removed by
clicking mouse button 3 (`set anchor') again.
<p>
To rotate an object, use <a href="#rotate">ROTATE</a>.

<hr>

<dt><img src="images/rotate-cw-button.png" alt="">
  <img src="images/rotate-ccw-button.png" alt="">
  <a name="rotate"></a>
Rotate object
<dd>
<p>
Clicking an object with mouse button 1 (`rotate object')
will rotate the object to clockwise or counter-clockwise
by the angle specified by
<a href="attributes.html#rotation-angle">ROTATION ANGLE</a>
about the point that is clicked.
<p>
It is also possible to make many copies in this mode,
using <i>COPY &amp; ROTATE</i>.
Clicking object with mouse button 2 (`copy &amp; rotate')
may make many copies rotated by the angle specified by the
<a href="attributes.html#rotation-angle">ROTATION ANGLE</a>.
The number of copies to be created may be set by
<a href="attributes.html#num-copies">NUMBER OF COPIES</a>.
<p>
As in <a href="#flip">FLIP VERTICALLY/HORIZONTALLY</a>,
it is possible to set the <i>anchor point</i>
about which the object will be rotated,
by clicking mouse button 3 (`set anchor').

<p>
<a href="drawing.html#box">BOX</a>,
<a href="drawing.html#arc-box">ARC-BOX</a>
and <a href="drawing.html#picture">PICTURE</a> objects,
and <a href="editing.html#glue-compound">COMPOUND</a>
objects containing any of those objects may only be rotated
by multiples of 90 degrees.
To flip object vertically or horizontally,
use <a href="#flip">FLIP VERTICALLY/HORIZONTALLY</a>.

<hr>

<dt><img src="images/spline-line-button.png" alt="">
  <a name="spline-line"></a>
Convert object type
<dd>
<p>
Clicking an object with mouse button 1 (`spline &lt;-&gt; line')
will perform a conversion thus:
<dl>
<dd><img src="images/blueballdot.png" align=bottom alt="-">
polyline --&gt; open approximated spline --&gt;
 open interpolated spline --&gt; polyline
<br>
<dd><img src="images/blueballdot.png" align=bottom alt="-">
polygon --&gt; closed approximated spline --&gt;
 closed interpolated spline --&gt; polygon
<br>
<dd><img src="images/blueballdot.png" align=bottom alt="-">
box --&gt; arc-box --&gt; box
</dl>
<p>
Clicking an object with mouse button 3 (`open &lt;-&gt; close')
will perform a conversion thus:
<dl>
<dd><img src="images/blueballdot.png" align=bottom alt="-">
polyline &lt;-&gt; polygon
<br>
<dd><img src="images/blueballdot.png" align=bottom alt="-">
open approximated spline &lt;-&gt; closed approximated spline
<br>
<dd><img src="images/blueballdot.png" align=bottom alt="-">
open interpolated spline &lt;-&gt; closed interpolated spline
</dl>
<p>
Finer control is possible for spline curves.
See <a href="#edit-point">EDIT POINT</a>
and <a href="drawing.html#spline">About Spline Curves</a>
for more information.

<hr>

<dt><img src="images/add-arrow-button.png" alt="">
  <a name="add-arrow"></a>
Add/delete arrow head
<dd>
<p>
Clicking the end point of object with mouse button 1 (`add arrow')
will add an arrow head to that end.
Clicking an arrow head with mouse button 2 (`delete arrow')
will remove the arrow head.
<p>
This operation is only valid for <a href="drawing.html#polyline">POLYLINE</a>,
<a href="drawing.html#spline">OPEN SPLINE</a>,
or <a href="drawing.html#arc">OPEN ARC</a> objects.
<p>
The shape of the arrow head may be set by
<a href="attributes.html#arrow-type">ARROW TYPE</a>.
The size of arrow head may be set by
<a href="attributes.html#arrow-size">ARROW SIZE</a>.
It is also possible to automatically create arrow heads when
creating new objects
by setting <a href="attributes.html#arrow-mode">ARROW MODE</a>.

<hr>

<dt><a name="add-tangent"></a>
<img src="images/add-tangent-button.png" align="middle" alt="">
Add Tangent or Normal to Curve
<dd>
<p>
Clicking mouse button 1 near a curve of an arc or spline will create a
2cm line <b>tangent</b> to the curve, with the current line attributes
such as thickness, color, etc. The line has three points, with the middle point
touching the original curve.
<p>
Clicking mouse button 2 near a curve will create a 2cm line <b>normal</b> to
the curve.

<hr>

<dt><a name="measure-angle"></a>
<img src="images/measure-angle-button.png" align="middle" alt="">
Measure Angle
<dd>
<p>
Clicking mouse button 1 on a vertex of a polyline or polygon will report
(in the message window below the main menus)
the angle between the two lines meeting at the vertex.
<p>
Clicking mouse button 1 on any three points in the canvas will report
the angle between the two lines formed by the three points.
<p>
Clicking mouse button 2 on the vertex of a polyline or polygon will report
the angle between the two lines meeting at the vertex, <b>and</b> save
the angle in the <a href="attributes.html#rotation-angle">current rotation angle</a>
setting in the attributes panel.

<hr>

<dt><a name="measure-length"></a>
<img src="images/measure-length-button.png" align="middle" alt="">
Measure Length of Lines and Arcs, and Perimeters of Circles and Ellipses
<dd>
<p>
Clicking mouse button 1 on any polyline, polygon, box, arc or circle/ellipse will report
(in the message window below the main menus)
the length of the lines forming the object, or the perimeter for a circle or ellipse.
<p>
Clicking mouse button 2 on such an object will add the length to
a running sum and report the individual and accumulated lengths.
<p>
Clicking mouse button 3 will reset the accumulated length to 0.

<hr>

<dt><a name="measure-area"></a>
<img src="images/measure-area-button.png" align="middle" alt="">
Measure Area of Polygons and Ellipses
<dd>
<p>
Clicking mouse button 1 on any polyline, polygon, box or circle/ellipse will report
(in the message window below the main menus)
the area of the object.
<p>
Clicking mouse button 2 on such an object will add the area to
a running sum and report the individual and accumulated areas.
<p>
Clicking mouse button 3 will reset the accumulated area to 0.
<p>
<img src="images/pict-info.png" alt="">
The area for polygons that have overlapping parts will not be calculated correctly.
This should be fixed in a future version.
<br>
Will work correctly:
<img src="images/measure-area-goodpoly.png" alt="">
Will NOT work correctly:
<img src="images/measure-area-badpoly.png" alt="">

</dl>

<img src="images/blueramp.png" alt="-">

<h2><img src="images/pict-info.png" alt="">
  <a name="select-object">Selecting Objects</a></h2>

Objects may be selected by clicking the <i>corner markers</i>
(<i>handles</i>) of the object.
The corner markers are small square marks
which are displayed at the corner point of objects
which may be selected for any particular mode.
<p>
Most objects may also be selected by clicking on the line
connecting corner markers,
but it may have a different meaning in some editing modes.
For example in the <a href="#scale">SCALE OBJECT</a> mode,
clicking on a corner marker will scale the object proportionally
to its horizontal/vertical ratio,
but clicking on a line connecting corner markers (edge of the rectangle)
will scale the object only in that direction (i.e. horizontally or vertically).
<p>
If <a href="attributes.html#point-position">POINT POSITION</a>
is set to other than <i>Any</i>,
objects which are not on the virtual grid may not be be selected.
<p>
When object corners or edges are coincident, clicking on the object
may not select the desired object but the other object instead.
In this case, the desired object may be selected with following operations:
<ol>
<li>Press (and hold) the SHIFT key and click on the object to be selected.
<li>If the corner marker of the other object is highlighted,
keep the SHIFT key down and click the object again.
<li>When corner marker of the desired object is highlighted,
release the SHIFT key and click the object again.
</ol>
Note that you shouldn't move the mouse during this operation.

<p>
<img src="images/blueramp.png" alt="-">

<h2><a name="edit-panel">EDIT Panel</a></h2>

The Edit Panel will popup when an object is selected
in <a href="#edit">EDIT OBJECT</a> mode,
and it shows all of the attributes of the object.
The Contents of the Edit Panel varies depending one the type of object.
This shows a few of those Edit Panels.

<h3>General</h3>

<blockquote>
  <img src="images/edit-panel-polyline.png" alt="[Edit Panel - Polyline]">
</blockquote>

<p>
<dl>

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Comments</i>
<dd>Every object may have comments associated with it for informational purposes.
This is an ASCII text widget which may hold up to 50 lines of 200 characters each.
<br>
The whole figure may also have comments. To edit these,
click mouse button 2 (`edit Fig comments')
on the canvas after choosing the <a href="#edit">Edit mode</a>.

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Width</i>
<dd>The width of the line.
(see <a href="attributes.html#line-width">LINE WIDTH</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Pen Color</i>
<dd>The color used to draw the outline of the object.
(see <a href="attributes.html#pen-color">PEN COLOR</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Fill Color</i>
<dd>The color used to fill region inside the object.
(see <a href="attributes.html#fill-color">FILL COLOR</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Depth</i>
<dd>The `<i>depth</i>' of the object.
(see <a href="attributes.html#depth">DEPTH</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Fill Style</i>
<dd>The fill intensity (darkness) or fill pattern.
The <i>Fill Intensity</i> is effective if <i>Fill Style</i> is <i>Filled</i>,
and <i>Fill Pattern</i> is effective if <i>Fill Style</i> is <i>Pattern</i>.
<i>Fill Intensity</i> is an integer value from 0 to 200;
0 for black, 100 for pure <i>Fill Color</i>, and 200 for white.
<br>
The <i>Fill Pattern</i> is an integer value from 0 to 21.
(see <a href="attributes.html#fill-style">FILL STYLE</a> for the actual patterns)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Line Style</i>
<dd>The line style.
(see <a href="attributes.html#line-style">LINE STYLE</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Cap Style</i>
<dd>The shape of the end-points of the line.
(see <a href="attributes.html#cap-style">CAP STYLE</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Join Style</i>
<dd>The shape of the join point (corner) of lines.
(see <a href="attributes.html#join-style">JOIN STYLE</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Arrows</i>
<dd>Indicates whether the object has arrow heads at one or both ends.
The shape and size of the arrow heads may be modified here.
(see <a href="attributes.html#arrow-type">ARROW TYPE</a>
and <a href="attributes.html#arrow-size">ARROW SIZE</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Corner Radius</i>
<dd>The radius of the corners for ARC-BOX objects.
(see <a href="attributes.html#box-curve">BOX CURVE</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Center, Radius, Points, etc.</i>
<dd>These fields indicate the position and size of the object, and
the coordinates of any points, in <b>Fig</b> units (1/1200 inch).
<br>
<img src="images/pict-info.png" alt="">
Note: For these entries, you may enter values followed by either &quot;c&quot; or &quot;i&quot;
for centimeters or inches respectively.
</dl>

<hr>

<h3><a name="edit-text-panel">TEXT object</a></h3>

<blockquote>
  <img src="images/edit-panel-text.png" alt="[Edit Panel - Text]">
</blockquote>

<p>
<dl>

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Size</i>
<dd>The size of the text, in points.
(see <a href="attributes.html#text-size">TEXT SIZE</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Pen Color</i>
<dd>The color of the text.
(see <a href="attributes.html#pen-color">PEN COLOR</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Depth</i>
<dd>The `<i>depth</i>' of the object.
(see <a href="attributes.html#depth">DEPTH</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Angle</i>
<dd>The angle of the text, in degrees.  Angles &gt; 0 are counterclockwise.
(see <a href="attributes.html#text-angle">TEXT/ELLIPSE ANGLE</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Justification</i>
<dd>Indicates which part of the text is placed at the specified point.
(see <a href="attributes.html#text-justification">TEXT JUSTIFICATION</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Hidden Flag, Rigid Flag, and Special Flag</i>
<dd>The state of those flags.
(see <a href="attributes.html#text-flags">TEXT FLAGS</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Origin</i>
<dd>The position of the text.

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Font</i>
<dd>The font used for the text.
The size of the font is displayed in the <i>Size</i> field.
(see <a href="attributes.html#text-font">TEXT FONT</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Text</i>
<dd>This field contains the text itself,
and it is possible to edit the text here.  Pressing <I>Ctrl-Return</I>
in the text box will pop down the edit panel.
It is also possible to edit text without popping up the Edit Panel;
in <a href="drawing.html#text">TEXT</a> mode,
simply click any point of the text to be edit.
</dl>

<hr>

<h3><a name="edit-pict-panel">PICTURE object</a></h3>

<blockquote>
  <img src="images/edit-panel-picture.png" alt="[Edit Panel - Picture]">
</blockquote>

<dl>

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<a name="screen-capture"><i>Screen Capture</i></a>
<dd>This is used to capture an image displayed on the screen.
After clicking <i>Screen Capture</i> button,
you can perform one of following actions:
<ol>
<li>click mouse button 1 on any window to capture the whole window
<li>click mouse button 1 on the root window (background of the screen)
to capture the whole screen
<li>click mouse button 2 on one corner of a rectangle on the screen,
drag the mouse to the other corner and click mouse button 2 again,
to capture image in the rectangle
<li>click mouse button 3 to cancel capture operation
</ol>
During the capture operation,
<b>xfig</b> unmaps all its windows from the screen.
Those windows reappear on the screen when completing or cancelling the capture.
The captured image will be displayed on the canvas in the picture object area.
During the capture, the <b>xfig</b> window(s) will be hidden (unmapped).
The captured image will be stored in a file
such as <tt>figure1_828065129.pcx</tt>,
which includes the current figure name
and the time in seconds since 00:00:00 GMT, Jan 1, 1970.
The file format will be PCX, and will be indicated in the
picture type area.
<p>
You can't use this facility
if visual of your display is TrueColor or it is deeper than 8 bits.
<p>

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<a name="edit-image"><i>Edit Image</i></a>
<dd>Clicking this button will invoke an external bitmap editor
(the default is <a href="installation.html#related-software"><b>xv</b></a>)
to edit the image.
Program that will be invoked can be checked on the
<a href="global_settings.html">Global Settings panel</a>.
<i>Edit Image</i> will invoke <b>xv</b> by default,
but you can change it to invoke your favorite bitmap editor
(<a href="installation.html#related-software"><b>xpaint</b></a>
or <a href="installation.html#gimp"><b>GIMP</b></a>, for example)
with the resource <tt>Fig.image_editor</tt>
or command-line argument <tt>-image_editor</tt>.

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Pen Color</i>
<dd>This is effective only when the image file is XBM format and will be used
to color the bits of the image.

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Depth</i>
<dd>The `<i>depth</i>' of the object.
(see <a href="attributes.html#depth">DEPTH</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Picture Filename</i>
<dd>Specify the file name of the image file.

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Type, Size, and Number of colors</i>
<dd>Information such as file format or size of the image is displayed here.
They may not be modified.

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Reread</i>
<dd>Clicking this button will cause <b>xfig</b> to re-read the image file.
This may be necessary when the image file has been modified
after the file has been read by <b>xfig</b>.

<dt>
<a name="browse-panel"><img src="images/redballdot.png" align=bottom alt="-"></a>
<i>Browse</i>
<dd>Clicking this button will popup a Browse Panel
to select an image file to be imported.
Click on an image file and press <b>Apply</b> to preview it,
or double-click on it to choose it and close the browse panel.
You may change directories in the same manner as in the file panels.
The <b>Filename Mask</b> by default will show all image types that
<b>xfig</b> can import.
<br>
<img src="images/image_browse.png" align=bottom alt="[ Browse Image Files ]">

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>First Corner, and Opposite Corner</i>
<dd>The position of two corner points of the rectangular region
where the image is pasted.

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Orientation</i>
<dd><i>x</i> and <i>y</i> coordinates of the image will be swapped
if <i>Flipped about diag</i> is selected here.

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Rotation</i>
<dd>The rotation angle of the image.  It may not be modified here.
(see <a href="#rotate">ROTATE</a>)

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Cur H/W Ratio and Orig H/W Ratio</i>
<dd>The current and original horizontal/vertical ratio of the image.

<dt>
<img src="images/redballdot.png" align=bottom alt="-">
<i>Change H/W Ratio</i>
<dd>These buttons may be used to set horizontal/vertical ratio of the image.
<dl>
<dt><i>Shrink to orig</i>
<dd>revert to horizontal/vertical ratio without expanding the image.
<dt><i>Expand to orig</i>
<dd>revert to horizontal/vertical ratio without shrinking the image.
<dt><i>Use original size</i>
<dd>Clicking <i>Use original size</i> will set size of the image
to the original size in the picture file.
<dt><i>Scale by %</i>
<dd>Clicking <i>Scale by %</i> will scale the image
by a percentage of the original size in the picture file.
</dl>
</dl>

<hr>

<h2><a name="edit-point">EDIT POINT</a></h2>

The Edit Point panel is used to modify the <i>shape factor</i>
of control points of <a href="drawing.html#spline">spline curves</a>,
and it will popup by clicking on a control point of spline curve
with mouse button 3 (`edit point') in <a href="#edit">EDIT OBJECT</a> mode.
The <i>shape factor</i> will control the shape of the curve.
<p>
<blockquote>
  <img src="images/edit-point-panel.png" alt="[Edit Point Panel]">
</blockquote>
<p>
Clicking <i>Approximated</i>, <i>Angular</i>, or <i>Interpolated</i>
button will set the shape factor to a preset value.
The shape factor may also be set to arbitrary values
by moving the slider on the left side of the panel.
The modified spline curve will be displayed interactively in either case.
<p>
<blockquote>
  <img src="images/spline-sf-example.png" alt="[Spline - Shape Factor]">
</blockquote>
<p>
The shape factor of a control point may also be modified
without popping up the Edit Point panel
by clicking the control point while pressing both of SHIFT key and CONTROL key.
Clicking a control point with mouse button 1 (`More approx')
will decrease the shape factor,
and clicking a control point with mouse button 3 (`More interp')
will increase the shape factor.
Clicking a control point with mouse button 2 (`Cycle shape')
will cycle through three preset values:
Approximated, Angular, and Interpolated.

<p>
<hr>

[ <a href="contents.html">Contents</a> |
 <a href="introduction.html">Introduction</a> |
 <a href="authors.html">Credits</a> ]

</body>
</html>