With the mirror command, symmetries of objects or objects are obtained according to an axis you specify: You can use it to get symmetries of two and three dimensional objects.
Location of the Mirror Command
You can access the mirror command under the ribbon menu Drawings tab , under the Modify title.
Click the Mirror icon in the ribbon menu .
If you want to delete the objects whose mirror you will take, make sure that the Delete Old Entities on Mirror icon is active on the mirror toolbar that appears on the screen .
Select the objects and click the right mouse button.
In the drawing area, draw the reference direction for mirror.
The mirror of the object or objects you selected will be taken.
Selection of objects in mirror command and determining the first point for reference direction
Determining the second point for the reference direction