Has no effect and is included in LiveCode for compatibility with imported HyperCard stacks.Syntax:
set the markChar of <menuItem> to <character>
In HyperCard, the markChar property places a character (such as a checkmark) next to a menu item.
A handler can set the markChar to any value without causing a script error, but the actual appearance of the menu item is not changed.
See also: commandChar (property),