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<title>Perspectives - Using the GNAT Programming Studio</title>
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Previous: <a rel="previous" accesskey="p" href="Moving-Windows.html#Moving-Windows">Moving Windows</a>,
Up: <a rel="up" accesskey="u" href="Multiple-Document-Interface.html#Multiple-Document-Interface">Multiple Document Interface</a>
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<h3 class="section">4.6 Perspectives</h3>
<p><a name="index-perspectives-121"></a><!-- -->
GPS supports the concept of perspectives. These are activity-specific
desktops, each with their own set of windows, but sharing some common
windows like the editors.
<p>Depending on the activity you want to perform (debugging, version control,...)
you could switch to another perspective. For instance, in the context of the
debugger, the new perspective would by default contain the call stack window,
the data window, the debugger consoles,<small class="dots">...</small> each at your favorite location.
Whenever the debug starts, you therefore do not have to open these windows
again.
<p>The perspectives have names, and you switch perspectives by selecting the
menu /Window/Perspectives/. You can also create a new perspective by
selecting the menu /Window/Perspectives/Create New.
<p>GPS will sometimes automatically change perspectives. For instance, if you
start a debugger, it will switch to the perspective called "Debug" (if it
exists). When the debugger terminates, you are switched back to the
"Default" perspective (again, if it exists).
<p>When you leave a perspective, GPS automatically saves its contents (which
windows are opened, their location,<small class="dots">...</small>), so that when you are going back
to the same perspective you find the same layout.
<p>Likewise, when GPS exits, it will save the layout of all perspectives into
a file called <samp><span class="file">perspectives.xml</span></samp>, so that it can restore them when you
restart GPS. This behavior is controlled by the "Save desktop on exit"
preference, and can be disabled.
<p>One of the difficulties in working with perspectives is knowing which
windows will be preserved when you switch to another perspective, and which
windows will be hidden. There is a central area where all preserved windows
are found. Typically, it only contains editors (including if you have split
them side by side for instance). If you drag and drop another window on top
or to the sides of an editor, that window will be preserved when changing
perspectives, unless it was already found elsewhere in the new perspective.
The small tooltip that appears on the screen while you drag and drop will
tell you whether the window (if dropped at the current location) will be
visible in other perspectives or not.
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