2011

Table Of Contents
You can use the UCSICON command to switch between the 2D UCS icon and
the 3D UCS icon. You can also use the command to change the size, color,
and icon line width of the 3D UCS icon.
The UCS broken pencil icon replaces the 2D UCS icon when the viewing
direction is in a plane parallel to the UCS XY plane. The broken pencil icon
indicates that the edge of the XY plane is almost perpendicular to your viewing
direction. This icon warns you not to use your pointing device to specify
coordinates.
When you use the pointing device to locate a point, it's normally placed on
the XY plane. If the UCS is rotated so that the Z axis lies in a plane parallel to
the viewing planethat is, if the XY plane is edge-on to the viewerit may
be difficult to visualize where the point will be located. In this case, the point
will be located on a plane parallel to your viewing plane that also contains
the UCS origin point. For example, if the viewing direction is along the X axis,
coordinates specified with a pointing device will be located on the YZ plane,
which contains the UCS origin point.
Use the 3D UCS icon to help you visualize which plane these coordinates will
be projected on; the 3D UCS icon does not use a broken pencil icon.
Quick Reference
UCSICON
Controls the visibility and placement of the UCS icon.
UCSICON
Displays the UCS icon for the current viewport or layout.
222 | Chapter 16 Use Precision Tools