How to unpair a device, screen?

Sometimes you need to unpair a screens when you not using it anymore or to move to different account.

You can do so from the Portal or from the device.

From Portal:

You can simply remove the screen:

From device:

you can open side menu (press the 3 bars button on FireStick Remote or press Enter on keyboard for Windows, Linux, Mac, etc.)

Then select Unpair