I have a monitor going bad and I'm too poor to get a new one. There is a section about 1" in width going vertically across my screen where the colours are inverted. Is there a linux program wherein I can select the area of the screen and have that section be software-inverted? That'll correct the problem until I can get a new monitor. My graphics card is fine, other monitors work fine when tested.
Lubuntu 16.10, Dell Inspiron 660s