To Create Datum Planes for Constraints
When a new datum plane is required for a constraint, you can create it on the fly while placing the component.
1. Click Datum.
2. Click 
. Component placement is paused and the Datum Plane dialog box opens.
. Component placement is paused and the Datum Plane dialog box opens.3. Create the datum plane with the offset required.
4. Click OK.
5. Click 
to resume component placement.
to resume component placement.