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
OR
type of at a Command: prompt
OR
select the Offset
button
on the Drawing
toolbar.
-Prompt: Specify through point: Use an Osnap, an Absolute Coordinate, a Relative Rectangular Coordinate, or 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.
Return to the AutoCAD Command List.