Graphics resolutions/Windowed vs borderless

[Splutty]

So I'm not sure where to post this.

 

I have multiple monitors, and I would really like the game to be borderless on a specific monitor. I know other games have these settings so it's not impossible to do, but currently I'm stuck with windowed (which I need to make smaller than the monitor due to it not being able to resize), or borderless on what Windows considers my main monitor.

 

It would be nice if 'windowed' is actually windowed and not with a set resolution, so you can resize it, maximize it, etc.

 

Anyone knows if I'm missing something somewhere? If this is at all possible in the current game, or if this needs to be added?