DDPM - Picture by picture interface missing control for secondary input

Feature request. Currently using DDPM 2.0.1.16:

When using PIP/PBP, there is no option to set input for secondary devices. My work require me to have 2 laptops, plus my personal desktop. PBP is a life saver for me but it is awkward to use. 

I suggest you improved the interface so it is easier to set input(s) in one place, one shot. An option to save frequently use layout could be a good option, although please don't mix it with you EasyArrange feature.