Creates a mirrored copy of selected 3D objects across a mirroring plane.
You can specify the mirroring plane by aligning the objects with a specified plane or by specifying three points.
For example:

It is recommended that you use the gizmos available through the 3DMOVE, 3DROTATE, and 3DSCALE commands to manipulate 3D objects.
The following prompts are displayed.
- Select objects
- Select the objects you want to mirror and press Enter.
- Object
-
Uses the plane of a selected planar object as the mirroring plane.
- Delete source objects
-
If you enter y, the reflected object is placed into the drawing and the original objects are deleted. If you enter n or press Enter, the reflected object is placed into the drawing and the original objects are retained.
- Last
-
Mirrors the selected objects about the last defined mirroring plane.
- Z axis
-
Defines the mirroring plane by a point on the plane and a point normal to the plane.
- View
-
Aligns the mirroring plane with the viewing plane of the current viewport through a point.
- XY/YZ/ZX
-
Aligns the mirroring plane with one of the standard planes (XY, YZ, or ZX) through a specified point.
- 3 points
-
Defines the mirroring plane by three points. If you select this option by specifying a point, the First Point on Mirror Plane prompt is not displayed.