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 on screen.
Click an item to select it.
Double-click an item to open it.
Drag to move an item or select multiple items.
Some computers use either a trackball or a trackpad instead of a mouse.
You can customize the way the mouse works with the Mouse control panel, which I tell you about in Chapter 14.
Move the mouse on the work surface or mouse pad. or Use your fingertips to move the ball of the trackball. or Move the tip of one finger (usually your forefinger) on the surface of the trackpad. The mouse pointer, which usually looks ...