Controlling Drop Zones
When constructing your template, you can disable drop zones so you don’t accidentally
drop a clip. Later, when using the template, you can turn drop zones back on.
To turn drop zones on and off
Choose View > Use Drop Zones
A checkmark appears next to the menu item when drop zones are enabled (which means
they accept objects dragged to them). When no checkmark appears next to the menu
item, drop zones are disabled (which means they ignore objects dragged to them).