Help needed: Can't select face when defining geometry
 

My newbie problem is that after importing CAD geometry into Fluent (Student), when I try to select a face, such as when defining inlet geometry, the Box Select tool only selects all surfaces - the entire object is selected.

There must be something obvious I am missing. The Zone Selection Filter is selected also (as I see in all the videos).

Note: I appreciate your patience, as I have actually spent hours trying to read, watch videos, search forum, spoke to Fluent user, etc.

Thank you, Jeff