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Grokking The Gimp
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1.1.2 The Image Window

The image window is the most important window in the GIMP. It is also the most feature-rich. Figure  1.2(a)

  
Figure 1.2: The Image Window
Figure 1.2

illustrates a typical image window. Note that the window title bar is marked
*image-window.xcf-16.0 (RGB) 200%
which gives quite a bit of information about this image. The string image-window.xcf is the name of the file on disk which contains the original version of this image, and the * indicates that the image in the window has been modified with respect to the version on the disk. Thus, to avoid losing the changes made to the image it must be saved (see Section  1.2). The string 16.0 gives the window number, 16, and the view number, 0. Every time a new image window is opened, the window number is incremented except when the new window is created using New View and, then, the view number is incremented (see Section  1.8.2 for more on view numbers). The string in parentheses, (RGB), gives the image type (see Section  1.4), which can be RGB, Grayscale, or Indexed. Finally, the string 200% indicates that the image is zoomed and is displayed in its window at twice its true size.

Additional information about the image can be had from the Window Info   dialog, which is shown in Figure  1.2(b), and which is found in the Image:View menu, or can be displayed by typing C-S-i in the image window. This dialog gives the image type, its dimensions in pixels, and its resolution in dots per inch. The units of the rulers at the left and upper sides of the image window correspond to the dimensions shown in the Window Info dialog. Moving the mouse cursor into the image window makes an arrow appear on each ruler, indicating the cursor's position. The cursor position is also precisely shown in the status bar.  In Figure  1.2(a), the status bar indicates that the mouse cursor is located at the position (99,150). Both the rulers and the status bar can be toggled off, which is done with Toggle Rulers  and Toggle Statusbar,  both found in the Image:View menu.

The most important feature of the image window is the Image menu,  shown in Figure  1.2(c). This menu is displayed by right-clicking in the image window and can also be displayed by clicking the arrow icon found in the upper-left corner of the window (see Figure  1.2(a)). The Image menu and its submenus stay open until one of its items has been selected by the mouse. However, these menus can be opened as separate windows    and, in so doing, be made to remain on the screen. This is done by clicking on the dashed line at the top of the menu. This is illustrated in Figure  1.2(d). The menu window can be eliminated from the screen by again clicking on the dashed line at the top of the menu.

When an image is larger than can be displayed by the image window, the scroll bars  seen in Figure  1.2(a) allow the image to be panned inside the window. However, there is also a special panner   window that can be displayed by clicking and holding the left mouse button on the four-way arrow icon found at the lower-right corner of the image window. The panner window is shown in Figure  1.2(e). Dragging the mouse in this window pans the image in the image window. Alternatively, the image can also be panned by middle-button-clicking and dragging with the mouse in the image window.

Finally, there are a pair of buttons found at the lower-left corner of the image window that are used for the Quick Mask  function. This function is covered in Section  4.5.2.

Grokking The Gimp
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  Published under the terms of the Open Publication License Design by Interspire