Commodore AMIGA Introduction Manual page 30

At the top is a title bar that identifies the Workbench. On the Workbench
is an icon, a small picture that represents the Workbench disk. You'll learn
more about icons later in this chapter.
Moving the Pointer
You use the Pointer, the small arrow on the display, to point to the things
you want to work with. Moving the mouse moves the Pointer. Without
pressing either of the mouse buttons on top of the mouse, try rolling the
mouse. Be sure to hold the mouse as shown below:
Getting Started 3-7