This chapter is from the book
The Mouse
Mac OS, like most graphic user interface systems, uses the mouse as an input device. There are several basic mouse techniques you must know to use your computer:
Point to a specific item onscreen.
Click an item to select it.
Double-click an item to open it. an item to open it.
Press an item to activate it.
Drag to move an item or select multiple items.
Tip
Some computers use either a trackball or a trackpad instead of a mouse.