Naturally, I recognise that OBS is free software, so nobody has a right to complain about it, but somebody wrote it from the same desire as is driving me to make this tutorial - altruism, I guess - and if issues are not brought to light, they can never be fixed. I'm writing a tutorial to describe the use of a piece of software that uses drop-down boxes when various things are right-clicked, and it's quite frustrating to be telling my audience what I am seeing on the screen without being able to show them. Has any advance in understanding been made since then? Is there a way around this issue? If OBS was making a faithful copy of the screen, as I thought it was, then shouldn't it capture what is on the screen? You clearly know something about this that I don't, but could you please explain it better? and yet, if I use the mouse to bring up a drop-down box (and I tried this in several different contexts - drop-down boxes in different programs, and also in the OS), and I do a 'print screen' (Fn-Insert on my laptop), then I go to MS Paint and paste in the image, I see that Prt_Scr has captured the entire screen as seen - complete with the drop-down box.

Fl studio only records one bar