How do I invert colors? black to white-white to black

[Texasgerry]

Inverting colors from white to black-black to white?

[ssprengel]

You can invert colors or B/W using Levels (Ctrl-L or Enhance / Adjust Lighting / Levels), by swapping the left and right Output Levels sliders:

[ssprengel]

Also Ctrl-i (control-eye) will do it, like in Photoshop.