How about adding a little more border area so the window can EASILY be resized.
i agree with this idea
My concern is that a thicker border around Bluebeam would reduce the usable screen space. Maybe there’s a way to make the border easier to grab without actually increasing its thickness?
It would be nice to have defined/visible grab handles that are easy to grab to resize windows. They don't need to be huge, just big enough that you don't need great precision and minute mouse control to resize a window.
I agree with this suggestion, currently, above the standard windows dark theme, the border of the Revu window is simply invisible. No need to lose usable screen space, even a 1px wide border of a different color like mid-grey would enable to see the edge of the window.