You can use the Mirror command to mirror drawing elements about an axis.


How to mirror drawing elements about an axis:

  1. Click on Modify > Mirror on the Ribbon.

or

  1. Enter MIRROR in the command window.
  2. Select one or more drawing elements in the graphics area.
  3. Press Enter to complete your selection.
  4. Specify the first point of the mirror axis.
  5. Specify the second point of the mirror axis.
  6. Press Enter to keep the source objects and to mirror and paste a copy.
    or
    Enter Yes in the command window to mirror the source objects.