AT DIST allows you to create a parallel line at a 
specified distance from a selected reference line.

Enter the desired distance from the reference line and 
press <Enter>, or press <Enter> to accept the default
value.

Select an existing line as a reference for creating the
parallel line.

The parallel line can be created on either side of the
reference line. Use the cursor to indicate the desired 
side.

Regardless of the 2-D/3-D construction switch setting, the
line is always created in the construction plane.

With the L-LIMIT switch set to FUNCTN, the line that you
create is the same length as the specified reference line.
With this switch set to VIEWPORT, the line that you create 
is drawn to the screen limits.
