Here’s how to set up a graphics-accelerated zoom feature on your desktop. The intent is a magnifier for the visually impaired, but I find it handy to highlight a small part of the desktop for focus or demonstration.
First, install prerequisites.
sudo apt -y install compizconfig-settings-manager compiz-plugins-default
Next, run ccsm (as your normal, non-root user) from the command line or the Dash .
Under “Accessibility” find “Enhanced Zoom Desktop”. Enable it. In the settings for the plugin, set Super+Button4 as the “Zoom In Button” and Super+Button5 as the “Zoom Out Button”. Done!
To zoom, hold down the “Super” key (windows key on a PC keyboard, Command key on a Mac keyboard) and scroll in either direction.
