Separate resolution + window/fullscreen settings between spectating and playing?

Would it be possible to have separate resolution and window/fullscreen settings each for playing and spectating games?

When I play I love to be at full screen 2560x1440, but I don't want to spectate like that. I'd like to spectate at borderless 1920x1080 so I can keep the game visible while looking at other programs. I know you can just change the settings every time, but it'd be nice to have them separate.

What it currently is:

Resolution:______ Windowed mode: ______

.

What I think it could be:

Resolution:______ Windowed mode: ______

Separate spectator settings: ______ (leave unchecked if same as above)

Resolution:______ Windowed mode: ______ <-- These would be grayed out if "Separate spectator settings: " was unchecked.