"Documentation
GIMP User Manual
GIMP comes with a built-in help system. Once you have started the program, press F1 for context-sensitive help. You may have to install the help pages from a separate package (gimp-help), depending on how your version of GIMP was packaged.
The user manual for the GIMP 2.8 release is available in several languages:
Deutsch
English
Français
Italiano
日本語(Japanese)
Nederlands
Español
한국어(Korean)
Norwegian
Pусский
Ελληνικά"