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#!N
#!CDarkGreen #!N #!Rzooming Zooming into and
out of the Image #!N #!EC #!N #!N To zoom in
or out (relative to the center of the Image window): #!N
#!I0 #!N #!F-adobe-times-medium-r-normal--18* #!N #!N #!I30 #!N 1. Select the #!F-adobe-times-bold-r-normal--18*
Zoom #!EF mode in the #!F-adobe-times-bold-r-normal--18* Mode #!EF option box, or
use the #!F-adobe-times-bold-r-normal--18* Ctrl+Z #!EF accelerator key. #!N #!I30 #!N 2.
To zoom in, press the #!F-adobe-times-medium-i-normal--18* left #!EF mouse button; to
zoom out, press the #!F-adobe-times-medium-i-normal--18* right #!EF mouse button. Drag the
mouse in the image area. This causes an overlay image of
a rectangle to appear. As you move the mouse pointer away
from the center of the window, the rectangle enlarges. As you
move the mouse pointer towards the center of the window, the
rectangle shrinks. Releasing the mouse button causes the image to zoom
in or out, depending on which mouse button is pressed. If
the left button (zoom in) is pressed, the portion of the
image inside the rectangle is enlarged to fill the Image window.
If the right button is pressed (zoom out), the image displayed
in the Image window is reduced to the size of the
rectangle. Note: You can also enable #!F-adobe-times-bold-r-normal--18* Zoom #!EF mode by
using the #!F-adobe-times-bold-r-normal--18* intrctnMode #!EF parameter to the Image tool (see
Image in IBM Visualization Data Explorer User's Reference). #!N #!I0 #!N
#!EF #!N #!N #!N For both orthographic and perspective projection, zooming
in makes the object appear larger in the Image window, while
zooming out makes it appear smaller. However, the way that this
is accomplished is different depending on which projection method is selected:
#!N #!I0 #!N #!F-adobe-times-medium-r-normal--18* #!N #!N #!I30 #!N o While using
perspective projection, zooming in or out changes the view angle, without
changing the look-from point. #!N #!I30 #!N o While using orthographic
projection, zooming in or out adjusts width of the image. The
camera look-from point does not change, because with orthographic projection the
look-from parameter merely specifies a direction, not a location in space.
#!N #!I0 #!N #!EF #!N #!N #!N For more information about
the projection methods, see #!Lprojmet,dxall302 h Changing the Projection Method #!EL . #!N #!N #!N #!F-adobe-times-medium-i-normal--18* Next
Topic #!EF #!N #!N #!Lroam,dxall307 h Changing the Look-to Point #!EL #!N #!F-adobe-times-medium-i-normal--18* #!N
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