Is there a way to display a miniature version of the secondary display's contents on the primary display? This is for doing a live demo during a presentation, while keeping a dual-display setup to also show notes on the primary display. I have a vague feeling that this should be possible somehow, but I don't have enough experience with xrandr.
A coarse internet search hasn't revealed anything useful. I'm aware of solutions like LibreOffice's presenter mode, or
pdf-presenter-console. This question is about displaying interactive contents on the secondary console. A solution doesn't need to involve xrandr, a utility that captures a portion of the screen and clones it in another window would also work.
I'm on Ubuntu 17.04.