Called by the default position-utility-dialog method to
decide which convention to use for positioning a utility dialog. The
default method simply returns the value of the center-all-modal-dialogs-on-screen
configuration option, which is either
application could add methods on this generic function to override the
global configuration default for particular owner windows. The method
should still return one of the three possible values of center-all-modal-dialogs-on-screen
if the default position-utility-dialog method is
Common Graphics and IDE documentation is described in About Common Graphics and IDE documentation in cgide.htm.
The documentation is described in introduction.htm and the index is in index.htm.
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