To Create a Theoretical Point
By using the Theoretical option, you can create a constructed point with reference to an existing constructed or measured entity.
1. Click > 
Point. The CMM Construct tab opens.
Point. The CMM Construct tab opens.2. Select the parent reference Csys from the Parent Csys drop-down list.
3. Select Theoretical from the Type drop-down list.
4. Select a datum reference point.
5. Click OK.