Your permissions may allow you to add/modify/remove Co-Residents from a Unit (Co-Residents does not include Owners – adding Owners must still be done through Escrow).
To do this, search for the unit, and go to the Owners/Residents tab.
On the right hand side you will see a list of all current Owners and Residents.
Click the +Add button.
In the Create Resident window, enter in the contact information for the new Resident (at this time, the only available phone field is Work Phone, but feel free to enter a different number). Be sure to select the proper Resident Type from the drop down.