Whenever I open a character in a pop-out window, its default size is always way too large for the second monitor I use for my games. For the character windows to be useful, I have to spend a lot of time resizing them so that they fit on the screen. I don't have this problem when Roll20 is running in a tab on my primary monitor. I'm having this problem in Chrome on Windows 10. The second monitor is larger, but its resolution is lower than my primary monitor. My guess here is that when it creates a character pop-out window, it sets the dimensions based on the resolution of the primary display, rather than whichever display the Roll20 tab is on.