The OFFSET command allows you
to copy selected entities (lines, arcs, circles, plines or others) and place
the copy at a specific distance from the original or through an existing position
on another element (such as the endpoint of a line, center of a circle, etc.).
An OFFSET item will be parallel or concentric to its original.
type offset at a Command: prompt
type o at a Command: prompt
select the Offset button on the Drawing toolbar.
-Prompt: Specify through point: Use an Osnap or Absolute Coordinate, Rectangular Rectangular Coordinate, or a Relative Polar Coordinate to select the point to place the offset object through.
--Prompt: Specify point on side to offset: With the LEFT mouse button, click on the side of the original where you want the parallel copy located. See the FIGURE below.
NOTE: The last prompt will continue until you press Enter TWICE to get back to a Command: prompt and exit the Offset command.
Offset copies of lines are always parallel to the original.
Offset copied of an arc or circle are always CONCENTRIC with the original.