User Guide

GNU Image Manipulation Program
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14.10.17 The ‘Colors’ Submenu
Figure 14.81: The ‘Colors’ submenu
The Colors submenu contains operations which alter colors within the active layer. The operations at the top of the list access
the Color tools for the image. These are described in the Toolbox chapter.
Warning
This command operates only on the layer which is active at the time the command is called. Even after you make
another layer the active layer, the operation continues to affect the layer on which you performed the command.
14.10.17.1 Activating the submenu
• You can access this submenu from the image menubar through Layer → Colors.
14.10.17.2 Contents of the ‘Colors’ Submenu
In addition to the menu items relating to the color tools which are at the top of the list, the Colors submenu contains the following
menu items:
• Section 14.10.18
• Section 14.10.19
• Section 14.10.21
14.10.18 Desaturate
By using the Desaturate command, you can convert all of the colors on the active layer to corresponding shades of gray. This
differs from converting the image to grayscale in two respects. First, it only operates on the active layer and second, the colors
on the layer are still RGB values with three components. This means that you can paint on the layer, or individual parts of it,
using color at a later time.
Note
This command only works on layers of RGB images. If the image is in Grayscale or Indexed mode, the menu entry is
insensitive and grayed out.