The main window of The GIMP, shown in Figure 22.1, “The Main Window”, contains the main controls of the application. Closing it exits the application. At the very top, the menu bar offers access to file functions, extensions, and help. Below that, find icons for the various tools. Hover the mouse over an icon to display information about it.

Figure 22.1. The Main Window

The current foreground and background color are shown in two overlapping boxes. The default colors are black for the foreground and white for the background. Click the box to open a color selection dialog. Swap the foreground and background color with the bent arrow symbol to the upper right of the boxes. Use the black and white symbol to the lower left to reset the colors to the default.

To the right, the current brush, pattern, and gradient are shown. Click the displayed one to access the selection dialog. The lower portion of the window allows configuration of various options for the current tool.

Under the toolbox, a dialog shows options for the currently selected tool. If it is not visible, open it by double-clicking the tool's icon in the toolbox.

In the first section, use the drop-down box to select the image to which the tabs refer. By clicking Auto, control whether the active image is chosen automatically. By default, Auto is enabled.

Layers shows the different layers in the current images and can be used to manipulate the layers. Information is available in Section 22.5.6, “Layers”. Channels shows and can manipulate the color channels of the image.

Paths are a vector-based method of selecting parts of an image. They can also be used for drawing. Paths shows the paths available for an image and provides access to path functions. Undo shows a limited history of modifications made to the current image. Its use is described in Section 22.5.5, “Undoing Mistakes”.