Open the project define a Block and create Hole Feature Sets

Using the RetainerPlate.dgk model from the Examples folder. Calculate a Block and accept the default values.
Select the whole model and, from the Hole Feature Sets context menu, select Create Holes. This displays the Create Holes dialog.
In the Create Holes dialog:
1. Select Create compound holes.
2. Select Group holes by axis.
3. Deselect Edit after creation.
4. Click Apply, PowerMill creates five feature sets from the holes in the model.
5. Click Close.
Make Hole Feature Set 1 active.