visualize the selection channel in all its glorious detail by toggling the QuickMask button. A large component of learning how to use GIMP effectively is acquiring the art of making good selections—selections begin to delete the oldest items from the Undo History. Note Even though the Undo History is a component of an image, it is not saved when you save the image using GIMP’s native XCF format, which preserves important actions that do alter an image but cannot be undone: Closing the image The Undo History is a component of the image, so when the image is closed and all of its resources are freed, the Undo History goes

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 584 16.8.24 Extract Component . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 587 16.8.25 Mono Mixer displayed so that each image pixel conforms to one screen pixel. Channels A Channel is a single component of a pixel’s color. For a colored pixel in GIMP, these com- ponents are usually Red, Green, Blue visualize the selection channel in all its glorious detail by toggling the QuickMask button. A large component of learning how to use GIMP effectively is acquiring the art of making good selections—selections

will begin to delete the oldest items from the Undo History. Even though the Undo History is a component of an image, it is not saved when you save the image using GIMP's native XCF format, which preserves contain hundreds of anchor points, or even thousands. A path may contain multiple components. A "component" is a part of a path whose anchor points are all connected to each other by path segments. The in paths allows you to convert them into selections having multiple disconnected parts. Each component of a path can be either open or closed: "closed" means that the last anchor point is connected

feature freeze in October 1997. This meant that no new features would be added to the Gimp core libraries and program. GUM version 0.5 was also released early in October 1997. The developing work continued 759 for instructions on how to install them). The directory /pub/gimp/libs includes some of the libraries that enable some of Gimp’s optional features, such as the ability to load and save JPEG images. G imp Us e r’s Man u al 4 9 C h a p ter 4 Which Libraries Does Gimp Need? If you don’t have them already, you need to get the following libraries or pro- grams: • GTK+ (1.0.x), to compile Gimp. You

access a great GIMP Essential Training course on Lynda.com, available for free with your Surrey Libraries card.