Click Home tab > Utilities panel > Mirror Project to display the Mirror Project dialog.
Select a workplane from the list. This represents the coordinate system that you want to mirror the project along. In this example, select 2 from the Workplane list.
This displays the workplane on the model.
Select Calculate to automatically recalculate toolpaths and boundaries.
Click Transform. The Status area of the dialog displays the progress of the transformation.
The mirrored project is displayed in the graphics window.