1. Ensure that the active operation references a Mill or Mill/Turn workcell.

2. Select the required NC sequence on the Model Tree and click Mill > Edit > Mirror Step. The NC Sequences Mirroring dialog box opens.

3. Click Select and select the datum plane that you want to use as the mirror plane.

4. Click Keep if you want to keep the cutting conditions of the mirror NC sequence the same as that of the parent NC sequence or click Mirror if you want to mirror the cutting conditions of the parent NC sequence to the mirror NC sequence.

5. Click OK. Creo NC creates the mirror NC sequence for the selected NC sequence.