The command converts your image to
RGB mode. See the RGB description in
the Glossary for more information. Normally, you work in this mode,
which is well-adapted to the screen. It is possible to convert an RGB
image to Grayscale or Indexed mode, but be careful: once you have saved
the image, you can no longer retrieve the RGB colors, so you should
work on a copy of your image.
6.4.1. Activating the command