When in a bridged event, you may have extra display layout control. The following is "how" you change your layout for each bridge:
Radvision (ESU 17, ESU 18)
Using DTFM
Click 0 (zero) to change layouts
Polycom (ESU 13, ESU 16)
Far camera control
Depress ** twice
When menu comes up you can select the layout you want by depressing the number related to the layout
Codian (ESU 19, OCIO)
Far camera control
Click on arrows to change layout
With Zoom Cloud, you can also control the codec layout:
DTFM number 1
Press arrows for different layouts.