graphical ->expose: [graphical]Moves graphical in the stacking order of its device such that it is
displayed just on top of the argument graphical. If no argument is
given, the grapical becomes the topmost one.
See also graphical->hide, graphical->swap
and graphical->overlap.
Defaults: If the argument graphical is omited, the graphical
will be moved to the top of the device's graphical stack.
Diagnostics: Always succeeds but has no effect if the argument
graphical is not displayed on the same device.
- See also
- - graphical
->swap
- graphical->hide
