Once you have found an agent it is a simple matter to find all of that agent's listings.
Take for example, Mike Fowles. Find and open his record:
Now in the Find Residential Listings section, click on the Listings by this Agent button.
All residential and commercial listings and co-listings by this agent will open up as a separate list window layered on top of the open agent window:
You could in turn can open any of the listings above by double clicking on the individual listing rows.
All of the open records (listings, assessments, etc.) have buttons for cross-referencing other databases.