Many, many years ago I used to have two Wyse50 terminals, running split screens each with two parts. I did a lot of support on remote systems (via modem!) and I would have a session on a customer system, source code and running on our test system and internal stuff. I didn't have space for a third terminal.

At another job I had an office with a "U" shaped desk. I would spread printouts across half the "U" and swivel around between the computer and the printouts.