I just purchased this U4320Q and saw the screen shot of all the layouts it could do. They work in DDM easy arrange (sub divide screen into sections) but that is not why I got it. I want to layout options from multi inputs. This is the PBP- I only see 5x. Why can it not pull from the library of 1-5x windows? Then allow hot keys at least for PBP off and back to last select if not hand full of hotkey recalls. It would be nice to have option to turn boarders on between the window again in PBP. 

I am looking at this for some work projects where DP1 and DP2 are fed from a two outputs of a PC, HDMI in 1 is feed from a KVM, HDMI 2 feed from a device that is not a PC/ or Apple. I cannot install DDM on it, but does have mouse control. Is there way to maybe have the host PC have hot keys to change layouts even if the mouse built in KVM has control on that non PC? I could use stream deck to fire the hot keys.