The Map submenu contains operations that allow you to map the colors of an image to different colors in several ways.
Afsnit 8.34, “Rearrange Colormap”
Afsnit 8.35, “Set Colormap”
Afsnit 8.36, “Alien Map”
Afsnit 8.37, “Farveudveksling”
Afsnit 8.38, “Rotate Colors”
Afsnit 8.39, “Gradient Map”
Afsnit 8.40, “Palette Map”
Afsnit 8.41, “Prøvefarvelægning”
You can access this command from the main menu through Colors → Map.