I'm remoting to two different laptops, both Dell Windows 10 with 3140 x 2160. My local monitors are both 3840 x 2160 physically oriented for portrait (tall, not wide).
Connecting to Teamviewer on one remote fills the entire monitor and looks as if remote laptop is actually set for 3840 x 2160 portrait. It's perfect.
THE PROBLEM: But, remoting to 2nd monitor shows the exact image for the laptop's physical, landscape screen, using only the middle 1/3 of the monitor.
How do I configure display settings of 2nd Teamviewer connection to use entire portrait monitor to show 2nd remote laptop (desktop, and task bar etc below)?