I want to record a high res video of a zoomed in part of my screen.
Is there any way that I can increase the zoom level of my desktop?
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Try this one
sudo apt-get install xzoom
The usage is very simple, and exactly what I wanted:
start in terminal
place the window where it does not disturb you.
"drag" you mouse cursor from within the window to the spot of the screen you want to magnify.
I found this HERE answer no 2, I don't know if elementary uses compiz so no 1 might not be valid.