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<HTML><HEAD><TITLE>Xlib Programming Manual: Window Attributes: Save Under Flag</TITLE></HEAD><BODY><H1 ALIGN=center>3.2.5 Save Under Flag</H1><!.IN "Save Unders">Some server implementations may preserve contents of <B><A HREF="../create.html#InputClass">InputOutput</A></B>windows under other <B><A HREF="../create.html#InputClass">InputOutput</A></B>windows.This is not the same as preserving the contents of a window for you.You may get better visualappeal if transient windows (for example, pop-up menus) request that the systempreserve the screen contents under them, so the temporarily obscured applications do not have to repaint.<P>You can set the save-under flag to<B>True</B>or<B>False</B>(default).If save-under is <B>True</B>, the X server is advised that, when this window is mapped, saving the contents of windows it obscures would be beneficial.<H5 ALIGN=right><I>Next: <A HREF="backing.html">Backing Planes and Backing Pixel Attributes</A></I></H5><HR><ADDRESS><A HREF="http://tronche.com/">Christophe Tronche</A>, <A HREF="mailto:ch.tronche@computer.org">ch.tronche@computer.org</A></ADDRESS></BODY></HTML>⌨️ 快捷键说明
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