Resizing a PIP window should show some percentage value and should have an option to set specific sizes (25%, 50%, 75%, 100% etc) easily

[waydabber]

Discussed in https://github.com/waydabber/BetterDisplay/discussions/1546

Could resizing a PIP window show a zoom percentage (in its title bar) during the drag? It's hard to know when it's back to normal.

[waydabber]

There should also be an option to easily set specific common sizes (25%, 50%, 75%, 100% etc) in relation to the streamed content's native resolution.

[vexir]

I would also include a way to set size as a custom value, and perhaps an option to set its size as a % of the main display's width or height. A good UI model for choosing between these three modes are two input boxes (one for W/H), three buttons or a dropdown for the three modes, and a checkbox or icon to maintain aspect ratio. The three modes being:

1. Set size as % of sub-display's resolution
2. Set size as % of main display's resolution
3. Set size as manually input value

I could also see a world in which setting a size in physical units would be useful for some applications, but that feels very niche and difficult to calculate/potentially error-prone.