GIMPx.ru
This command leads to the following submenu
Figure 15.157. The “Map” submenu
Section 8.19, “Rearrange Colormap”
Section 8.20, “Set Colormap”
Section 8.21, “Alien Map”
Section 8.22, “Color Exchange”
Section 8.23, “Gradient Map”
Section 8.24, “Palette Map”
Section 8.25, “Rotate Colors”
Section 8.26, “Sample Colorize”