Install xzoom by entering the following commands in the terminal:
sudo apt update sudo apt install xzoom
Description:
magnify part of X display, with real-time updates
Like xmag, xzoom magnifies a section of the X display. Xzoom is different because it will continuously update the magnified area as the display changes. It is fast enough to enlarge small animations, for example. . It can also mirror or rotate a part of the screen.
Homepage: ftp://sunsite.unc.edu/pub/linux/libs/X/
Version: 0.3-24build1
Section: universe/x11