Unfortunately, most UNIX programs do not have a GUI for making adjustments to these files and modules. Here, thankfully, Gimp is an exception, because it includes a GUI for adjusting user-defined functions. However color map, you need to edit the gimprc file by hand (since Gimp won’t start, you can’t use Gimp’s GUI). You’ll have to do it in an xterm window (a terminal, console, etc.). Type in the command: vi ~/ gimprc and gtkrc are your personal settings files for Gimp and GTK+, respectively (GTK+ is Gimp’s GUI toolkit). Most of the settings in these files are adjustable via the Preferences dialog box in Gimp