Click on the Giving Units tab if you are using CDM+ Contributions  and wish to assign Giving Units to this family.

By default, CDM+ will create one Giving Unit for the family, assigning a unique Giver’s Code made up of the first letters (up to 4) of the last name and a number. This default entry may be deleted or changed. For instance, you may wish to change the Code to an envelope number. You may also add additional Giving Units. For example, if their daughter, Stephanie Delvecchio, wants to give separately to the church, you would change the default Giving Unit to just Albert & Camille and add a second Giving Unit for Staphanie. Both Giving Units are linked to the same address.