Not really sure if this is a question about the character sheet, or Roll20. There are several places where the player is allowed to enter a modifier to a roll. This is done by having a dialog box open that lets you enter the modifier value. One example is when clicking on one of the Runes. The problem is, if you have "use window popouts for characters" selected, the dialog box is in the exact center of the screen, and can be( usually is in my case ) covered up by the character sheet window. And I always have that option selected, because I have a second monitor, and that lets me drag the character window off to the side, where it doesn't cover up the map. Is there something I( and my players ) can do to force the dialog to be on top?