Commodore AMIGA Introduction Manual page 51

There are times when you must wait for the Workbench to finish an activity
before you can continue. When this happens, the Pointer changes shape and
becomes a Wait Pointer:
- - - Wait Pointer
When the Pointer returns to its original shape, you can continue working.
Selecting
To select an icon, point within it, then click the Selection button, the
left-hand button on the mouse:
4-6 Using the Workbench