What's your way of arranging open code files in your IDE's window?
I usually have 2-3 code files open side by side and keep the lines at a maximum of 80-120 characters.
Other devs I know mostly have only one file open in full width at any given time... which I can't wrap my head around.

Mostly only one at once.
If more than one, two split windows at most.
The rest are tabbed.

I really wish more devs respected the character limit per line. It would make it so much easier to work with multiple files at once.

Oh and don't bother recommending a multi-monitor setup. Just don't.