Commodore Amiga - Page 52

If you no longer want an icon selected, point to a place on the Workbench
that isn't occupied by an icon or gadget, then click the Selection button.
Extended Selection is a technique for selecting more than one icon in the
same operation . To use it, hold down the SHIFT key while you select icons.
Release the SHIFT key when you're done selecting:
Using
the Workbench 4-7