2004

70 | Chapter 6 Pointing Devices
Pointing Device Buttons
The first 10 buttons are automatically assigned, but you can reassign all but
button 1, the pick button.
On a two-button mouse, the left button is the pick button used to
■ Specify locations
■ Select objects for editing
■ Choose menu options and dialog box buttons and fields
The operation of the right button depends on context; it can be used to
■ End a command in progress
■ Display a shortcut menu
■ Display the Object Snap menu
■ Display the Toolbars dialog box
Right-click operation can be modified in the Options dialog box (
OPTIONS).
The operation of additional buttons on a pointing device is defined in the
AutoCAD menu file.
The Wheel Mouse
The wheel mouse has a small wheel between the buttons. The left and right
buttons behave the same as they do on a standard mouse. You can rotate the
wheel by discrete values. You can use the wheel to zoom and pan in your
drawing without using any AutoCAD commands.
By default, the zoom factor is set to 10 percent; each increment in the wheel
rotation changes the zoom level by 10 percent. The
ZOOMFACTOR system
variable controls the incremental change, whether forward or backward. The
higher the number, the larger the change.
The following table lists the wheel mouse actions supported in AutoCAD.
To... Do this...
Zoom in or out Rotate the wheel forward to zoom in,
backward to zoom out
Zoom to drawing extents Double-click the wheel button
Pan Hold down the wheel button and drag the
mouse