When giving presentations, I use the html/css/js-based
showoff. It has a presenter mode which shows the notes and the progress in a good way for me. It seems like the idea is that somehow a second browser gets the changes I do in this mode, but that does not work.
Therefore I thought of putting just the part of the presenter mode which displays the current slide (this is a 1024x768 area) on another device, namely the beamer display.
X has such a vast tooling box, I figured this could be possible. The presentation has been given with mirrored displays, which went good enough. What remains is the curiosity if it would have been possible:
Can I display part of a window on the second device?
xmonad as window manager normally. If this is supported by another window manager, I could switch just for presentations.
I am more interested in the way this could be achieved by
X11 means (or related tools) than just having the presenation run fine. That's just the incident that created my interest in such a solution.
I am still looking for a pure X11-solution, but the problem at hand is of course solved.