CHAPTER 5 SELECTION 207 Figure 5-41. A (Free web hosting services)
CHAPTER 5 SELECTION 207 Figure 5-41. A preview appears for the new layer mask. First, it shows you what the layer mask looks like. The new mask is all white, so it looks like a white rectangle. Once you start drawing in the mask, you ll see that the preview will give you an approximate idea of the mask s appearance. Second, and more important: the border of the preview is white, indicating that it is active. That means if you draw in the image, you ll be drawing on the layer mask (just as you drew on the QuickMask or on a selection channel), not on the image itself. This can be quite confusing. An image normally shows no visible indication of whether there s a layer mask active. When working with layer masks, it s important to keep the Layers dialog visible. Use the preview border colors to tell you whether you re working with the layer or with its mask. The one that has a white border is the one that s active. You can select the layer at any time by clicking on the layer preview in the Layers dialog. Click again on the mask to select it. Or use Edit Layer Mask in the context menu to toggle between the two. Caution When a layer mask is selected, drawing isn t the only GIMP operation that will be affected. The Move tool will move the mask, not the layer (if you had the mask lined up with the layer, it won t be lined up any more). Fortunately, Undo fixes minor mistakes like that. Also, saving to some file types will issue warnings if you try to save when you have a layer mask selected. You can cancel the save, go back and select the layer, and then save again.
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