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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"/><title>2&nbsp;Preferences</title><link rel="stylesheet" type="text/css" href="../scribble.css" title="default"/><link rel="stylesheet" type="text/css" href="../racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-style.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../manual-racket.css" title="default"/><link rel="stylesheet" type="text/css" href="../doc-site.css" title="default"/><script type="text/javascript" src="../scribble-common.js"></script><script type="text/javascript" src="../manual-racket.js"></script><script type="text/javascript" src="../manual-racket.js"></script><script type="text/javascript" src="../doc-site.js"></script><script type="text/javascript" src="../local-redirect/local-redirect.js"></script><script type="text/javascript" src="../local-redirect/local-user-redirect.js"></script><!--[if IE 6]><style type="text/css">.SIEHidden { overflow: hidden; }</style><![endif]--></head><body id="doc-racket-lang-org"><div class="tocset"><div class="tocview"><div class="tocviewlist tocviewlisttopspace"><div class="tocviewtitle"><table cellspacing="0" cellpadding="0"><tr><td style="width: 1em;"><a href="javascript:void(0);" title="Expand/Collapse" class="tocviewtoggle" onclick="TocviewToggle(this,&quot;tocview_0&quot;);">&#9660;</a></td><td></td><td><a href="index.html" class="tocviewlink" data-pltdoc="x">Unstable GUI:<span class="mywbr"> &nbsp;</span> May Change Without Warning</a></td></tr></table></div><div class="tocviewsublistonly" style="display: block;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1&nbsp;</td><td><a href="gui-notify.html" class="tocviewlink" data-pltdoc="x">Notify-<wbr></wbr>boxes</a></td></tr><tr><td align="right">2&nbsp;</td><td><a href="" class="tocviewselflink" data-pltdoc="x">Preferences</a></td></tr><tr><td align="right">3&nbsp;</td><td><a href="pict.html" class="tocviewlink" data-pltdoc="x">Pict Utilities</a></td></tr><tr><td align="right">4&nbsp;</td><td><a href="Slideshow_Presentations.html" class="tocviewlink" data-pltdoc="x">Slideshow Presentations</a></td></tr><tr><td align="right">5&nbsp;</td><td><a href="ppict.html" class="tocviewlink" data-pltdoc="x">Progressive Picts and Slides</a></td></tr><tr><td align="right">6&nbsp;</td><td><a href="snip.html" class="tocviewlink" data-pltdoc="x">Snip Utilities</a></td></tr><tr><td align="right">7&nbsp;</td><td><a href="Scribble_Utilities.html" class="tocviewlink" data-pltdoc="x">Scribble Utilities</a></td></tr></table></div></div></div><div class="tocsub"><div class="tocsubtitle">On this page:</div><table class="tocsublist" cellspacing="0"><tr><td><a href="#%28def._%28%28lib._unstable%2Fgui%2Fprefs..rkt%29._pref~3aget%2Fset%29%29" class="tocsublink" data-pltdoc="x"><span class="RktSym"><span class="RktValLink">pref:<span class="mywbr"> &nbsp;</span>get/<span class="mywbr"> &nbsp;</span>set</span></span></a></td></tr></table></div></div><div class="maincolumn"><div class="main"><div class="versionbox"><span class="version">6.1</span></div><div class="navsettop"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, &quot;6.1&quot;, &quot;../&quot;);" onfocus="this.style.color=&quot;black&quot;; this.style.textAlign=&quot;left&quot;; if (this.value == &quot;...search manuals...&quot;) this.value=&quot;&quot;;" onblur="if (this.value.match(/^ *$/)) { this.style.color=&quot;#888&quot;; this.style.textAlign=&quot;center&quot;; this.value=&quot;...search manuals...&quot;; }"/></form>&nbsp;&nbsp;<a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot(&quot;6.1&quot;);">top</a></span><span class="navright">&nbsp;&nbsp;<a href="gui-notify.html" title="backward to &quot;1 Notify-boxes&quot;" data-pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="index.html" title="up to &quot;Unstable GUI: May Change Without Warning&quot;" data-pltdoc="x">up</a>&nbsp;&nbsp;<a href="pict.html" title="forward to &quot;3 Pict Utilities&quot;" data-pltdoc="x">next &rarr;</a></span>&nbsp;</div><h3 x-source-module="(lib &quot;unstable/scribblings/gui/unstable-gui.scrbl&quot;)" x-part-tag="&quot;gui-prefs&quot;">2<tt>&nbsp;</tt><a name="(part._gui-prefs)"></a><a name="(mod-path._unstable/gui/prefs)"></a>Preferences</h3><div class="SAuthorListBox"><span class="SAuthorList"><p class="author">Ryan Culpepper &lt;<a href="mailto:ryanc@racket-lang.org">ryanc@racket-lang.org</a>&gt;</p></span></div><p><div class="SIntrapara"></div><div class="SIntrapara">This library is <span style="font-style: italic">unstable</span>;
compatibility will not be maintained.
See <a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=unstable&amp;rel=index.html&amp;version=6.1" class="Sq" data-pltdoc="x">Unstable: May Change Without Warning</a>
for more information.</div></p><p><table cellspacing="0" cellpadding="0" class="defmodule"><tr><td align="left"><span class="hspace">&nbsp;</span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&amp;rel=require.html%23%2528form._%2528%2528lib._racket%252Fprivate%252Fbase..rkt%2529._require%2529%2529&amp;version=6.1" class="RktStxLink Sq" data-pltdoc="x">require</a></span><span class="stt"> </span><a href="" class="RktModLink" data-pltdoc="x"><span class="RktSym">unstable/gui/prefs</span></a><span class="RktPn">)</span></td><td align="right"><span class="RpackageSpec"><span class="Smaller">&nbsp;package:</span> <span class="stt">gui-lib</span></span></td></tr></table></p><p><div class="SIntrapara"><blockquote class="SVInsetFlow"><table cellspacing="0" cellpadding="0" class="boxed RBoxed"><tr><td><blockquote class="SubFlow"><div class="RBackgroundLabel SIEHidden"><div class="RBackgroundLabelInner"><p>procedure</p></div></div><p class="RForeground"><span class="RktPn">(</span><a name="(def._((lib._unstable/gui/prefs..rkt)._pref~3aget/set))"></a><span title="Provided from: unstable/gui/prefs | Package: gui-lib"><span class="RktSym"><a href="#%28def._%28%28lib._unstable%2Fgui%2Fprefs..rkt%29._pref~3aget%2Fset%29%29" class="RktValDef RktValLink" data-pltdoc="x">pref:get/set</a></span></span><span class="hspace">&nbsp;</span><span class="RktVar">pref</span><span class="RktPn">)</span><span class="hspace">&nbsp;</span>&rarr;<span class="hspace">&nbsp;</span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&amp;rel=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._case-%7E3e%2529%2529&amp;version=6.1" class="RktStxLink Sq" data-pltdoc="x">case-&gt;</a></span><span class="hspace">&nbsp;</span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&amp;rel=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&amp;version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-&gt;</span></a></span><span class="hspace">&nbsp;</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&amp;rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&amp;version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span><span class="RktPn">)</span><span class="hspace">&nbsp;</span><span class="RktPn">(</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&amp;rel=function-contracts.html%23%2528form._%2528%2528lib._racket%252Fcontract%252Fbase..rkt%2529._-%7E3e%2529%2529&amp;version=6.1" class="RktStxLink Sq" data-pltdoc="x"><span class="nobreak">-&gt;</span></a></span><span class="hspace">&nbsp;</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&amp;rel=data-structure-contracts.html%23%2528def._%2528%2528lib._racket%252Fcontract%252Fprivate%252Fmisc..rkt%2529._any%252Fc%2529%2529&amp;version=6.1" class="RktValLink Sq" data-pltdoc="x">any/c</a></span><span class="hspace">&nbsp;</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&amp;rel=void.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._void%7E3f%2529%2529&amp;version=6.1" class="RktValLink Sq" data-pltdoc="x">void?</a></span><span class="RktPn">)</span><span class="RktPn">)</span></p></blockquote></td></tr><tr><td><span class="hspace">&nbsp;&nbsp;</span><span class="RktVar">pref</span><span class="hspace">&nbsp;</span>:<span class="hspace">&nbsp;</span><span class="RktSym"><a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=reference&amp;rel=symbols.html%23%2528def._%2528%2528quote._%7E23%7E25kernel%2529._symbol%7E3f%2529%2529&amp;version=6.1" class="RktValLink Sq" data-pltdoc="x">symbol?</a></span></td></tr></table></blockquote></div><div class="SIntrapara">Returns a procedure that when applied to zero arguments retrieves the
current value of the preference
(<a href="http://download.racket-lang.org/docs/6.1/html/local-redirect/index.html?doc=framework&amp;rel=Preferences__Textual.html&amp;version=6.1" class="RktModLink Sq" data-pltdoc="x"><span class="RktSym">framework/preferences</span></a>) named <span class="RktVar">pref</span> and when
applied to one argument updates the preference named <span class="RktVar">pref</span>.</div></p><div class="navsetbottom"><span class="navleft"><form class="searchform"><input class="searchbox" style="color: #888;" type="text" value="...search manuals..." title="Enter a search string to search the manuals" onkeypress="return DoSearchKey(event, this, &quot;6.1&quot;, &quot;../&quot;);" onfocus="this.style.color=&quot;black&quot;; this.style.textAlign=&quot;left&quot;; if (this.value == &quot;...search manuals...&quot;) this.value=&quot;&quot;;" onblur="if (this.value.match(/^ *$/)) { this.style.color=&quot;#888&quot;; this.style.textAlign=&quot;center&quot;; this.value=&quot;...search manuals...&quot;; }"/></form>&nbsp;&nbsp;<a href="../index.html" title="up to the documentation top" data-pltdoc="x" onclick="return GotoPLTRoot(&quot;6.1&quot;);">top</a></span><span class="navright">&nbsp;&nbsp;<a href="gui-notify.html" title="backward to &quot;1 Notify-boxes&quot;" data-pltdoc="x">&larr; prev</a>&nbsp;&nbsp;<a href="index.html" title="up to &quot;Unstable GUI: May Change Without Warning&quot;" data-pltdoc="x">up</a>&nbsp;&nbsp;<a href="pict.html" title="forward to &quot;3 Pict Utilities&quot;" data-pltdoc="x">next &rarr;</a></span>&nbsp;</div></div></div><div id="contextindicator">&nbsp;</div></body></html>