Three-dimensional space - Introduction to AutoCAD 2011: 2D and 3D Design - page 348

X and Y axes are showing, but when the drawing area is in a 3D view all
three coordinate arrows are showing, except when the model is in the XY
plane. The icon can be turned off as follows:
Command: enter ucsicon right-click
Enter an option [ON/OFF/All/Noorigin/ORigin/
Properties] <ON>:
To turn the icon off, enter off in response to the prompt line and the icon
disappears from the screen.
The appearance of the icon can be changed by entering p (Properties) in
response to the prompt line. The UCS Icon dialog appears in which changes
can be made to the shape, line width and colour of the icon if wished.
Types of UCS icon
The shape of the icon can be varied partly when changes are made in the
UCS Icon dialog but also according to whether the AutoCAD drawing
area is in 2D, 3D or Paper Space (Fig. 17.4).
Fig. 17.4 Types of UCS icon
Examples of changing planes using the UCS
First example - changing UCS planes ( Fig. 17.6 )
1. Set UCSFOLLOW to 1 (ON).
2. Make a new layer colour Red and make the layer current. Place the
screen in ViewCube/Front and Zoom to 1 .
3. Construct the pline outline (Fig. 17.5) and extrude to 120 high.
4. Place in ViewCube/Isometric view and Zoom to 1 .
5. With the Fillet tool, fi llet corners to a radius of 20 .