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I<(creation only)> Allows interactively changing the dialogs
size. Default: YES. If RESIZE=NO then MAXBOX will be set to NO. In
Motif the decorations are controlled by the Window Manager and may not
be possible to be changed from IUP.

=item B<SAVEUNDER>

I<[Windows and Motif Only] (creation only)> When this
attribute is true (YES), the dialog stores the original image of the
desktop region it occupies (if the system has enough memory to store
the image). In this case, when the dialog is closed or moved, a
redrawing event is not generated for the windows that were shadowed by
it. Its default value is YES. To save memory disable it for your main
dialog. Not available in GTK.

=item L<SHRINK|IUP::Manual::03_Attributes/SHRINK>

Allows changing the elements
distribution when the dialog is smaller than the minimum size. Default:
NO.