Compiz does have a Zoom Desktop and an Enhanced Zoom Desktop, but I've not tried them so I don't know how they work. It also has a Screen Magnifier, but that follows the mouse so I doubt that it's what you need.
Compiz does have a Zoom Desktop and an Enhanced Zoom Desktop, but I've not tried them so I don't know how they work. It also has a Screen Magnifier, but that follows the mouse so I doubt that it's what you need.