Mult-monitor setup is AWFUL PrPro's mult-monitor setup is a serious issue. And @Francis-Crossman17221443 @TrentHappel et al, talking to you.
You can "easily" drag a panel to another monitor, size it by dragging sides/corners to just a tab bit less than the monitor's screen edges, add additional panels into it, and create a workspace.
"Easily" as in a ton of mouse clicks and futzing. Taking several minutes, for EACH AND EVERY CUSTOM WORKSPACE. (Yea, I'm a bit ticked at this issue.)
Then, of course, you have to be careful because if you go ONE PIXEL over onto another screen, Premiere will get cranky and do many odd things. We sort out those odd things back to this issue every once in a while on the main u2u forums. Several a month. Year after year.
And if, Heaven forfend, you change your monitor layout diagram in Windows, now every freaking custom workspace you've got is WRONG as Premiere clearly takes the location from the main UI window in a relative sense, it does NOT recognize t