This is a command to offset a polyline and put the offset
polyline into a separate layer from the original polyline. The
Offset Both Sides For Open Polylines option can be used to create
easement perimeters. For example, you can pick a pipe polyline and
this option will offset to both sides to create an easement around
the pipeline.
Offset To Layer dialog
Select object to offset: pick
a polyline to offset
Specify point on side to offset: pick a point
Select a polyline to offset (Enter to end): press
Enter
Pulldown Menu Location: Edit > Offset
Keyboard Command: offset_layer
Prerequisite: Linework to offset