Overlapping Drop Zones
While you should avoid overlapping buttons, you can feel free to overlap drop zones,
because they are not involved in navigation. Because drop zones can be overlapped, you
should use care when adding them to the menu—those added later have a higher priority
and will cover up those added earlier.
To change a drop zone’s priority
Control-click it, then choose an option from the shortcut menu. See
About Button Numbers
for more information.
Note: Drop zones, text objects, and buttons are included in the same priority list; a drop
zone can have a higher priority, and thus cover up a button.