I can't remember exactly how many times I was asked to improve the colormap editor for raster maps.
For several reasons now I had to, so lucky the patient :)
This is how it looks now (in the next build):
We have the usual load from map, but now there is a consistent import and export possibility for colortables in GRASS format.
Also there is a combobox containing predefined colotables:
So if I choose the elevation colortable, I get:
When the colortable is chosen, the colorrules panel in the upper part updates itself, so it would be possible to modify that.