To manually construct an opening using a previously placed compound cell
Select the Construct Opening tool.
Choose Compound Cell from the By option menu and set the Method to Manual.
Select the compound cell that will create the opening.
Repeat step 2 to select more compound cells.
Reset to confirm the compound cell selection.
Select one or more forms that you want to cut using the selected compound cell.
The form(s) cut according to the perforators in the compound cell(s).