How do I add a Co-Listing Agent?
You can add a Co-Listing agent from the listing worksheet.

(click image above to enlarge)
Step 1
Select Listings from the main menu.
Step 2
Find your listing.
Step 3
Choose Add Co-Listing Agent.
Step 4
Select one from your office or MLS.
Step 5
Choose Notification preferences.
Please Note: These agents can be set up to have similar or different notification preferences than you do.