Returns or sets with setf the value of the selected property of the argument.
menu-item will be usually be
displayed with a check mark next its title when the menu is
displayed. However, if its cluster property is
true, then it will be displayed with a dot
instead of check mark, and any other menu-items in the same cluster
will be deselected automatically, making a set of menu-items act
similar to a group of
selected is a property of the
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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