2011

Table Of Contents
Quick Reference
Commands
OPTIONS
Customizes the program settings.
System Variables
PICKADD
Controls whether subsequent selections replace the current selection set or
add to it.
PICKDRAG
Controls the method of drawing a selection window.
The UCS Icon
The drawing area displays an icon representing the XY axis of a rectangular
coordinate system called the User Coordinate System, or UCS.
You can move or rotate the UCS with the UCS command. The UCS is useful
in 2D, and essential in 3D because it controls features that include
The angular orientation that defines horizontal and vertical
The alignment and angle of the grid, and hatch patterns
The origin and orientation for 2D and 3D coordinate entry
The orientation of construction places, projection planes, and the Z-axis
direction for many 3D operations
28 | Chapter 4 Control the Drawing Area Interface