Hi KBIRD - Multi View on the S90F includes Picture-in-Picture (PiP) capability, allowing you to watch content from two sources at the same time. For example, you can play an app, HDMI device, or live TV on the main screen, while mirroring your phone to the smaller PiP window. You can also choose the location of the PiP screen – top left, top right, bottom left, or bottom right – and move it later if needed. Please note that two HDMI sources cannot be viewed simultaneously.
~ Samsung Specialist