Drop -- Fields and Controls

Show Related
Click the Show Related push button to open the Show Related window. This window
shows you the relationships between objects and the effect of dropping
an object.
Uncheck All
Click the Uncheck All push button to deselect every object in the table. If
the check box for an object is not selected, the object is not dropped.
Check All
Click the Check All push button to select every object in the table. This
is the default state at the time the window is first opened. An object
is dropped only if its check box is selected.