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9.
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Click and drag on a ruler to place a guide on an image. All dragged selections will snap to the guides. You can remove guides by dragging them off the image with the Move tool.
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在尺規上按下滑鼠左鍵並拖曳至圖片內就可以加入參考線。以後任何拖曳的選擇區域都會自動吸引至參考網上。如果要去除參考線，可利用「移動」工具將參考線拖曳到圖片範圍以外。
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Translated by
Chao-Hsiung Liao
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Located in
../data/tips/gimp-tips.xml.in.h:11
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10.
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If some of your scanned photos do not look colorful enough, you can easily improve their tonal range with the "Auto" button in the Levels tool (Layer->Colors->Levels). If there are any color casts, you can correct them with the Curves tool (Layer->Colors->Curves).
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(no translation yet)
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Located in
tips/gimp-tips.xml.in.h:10
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11.
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If you stroke a path (Edit->Stroke Path), the paint tools can be used with their current settings. You can use the Paintbrush in gradient mode or even the Eraser or the Smudge tool.
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(no translation yet)
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Located in
tips/gimp-tips.xml.in.h:11
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12.
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If your screen is too cluttered, you can press <tt>Tab</tt> multiple times in an image window to hide or show the toolbox and other dialogs.
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(no translation yet)
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Located in
tips/gimp-tips.xml.in.h:12
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13.
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Most plug-ins work on the current layer of the current image. In some cases, you will have to merge all layers (Image->Flatten Image) if you want the plug-in to work on the whole image.
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(no translation yet)
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Located in
tips/gimp-tips.xml.in.h:13
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14.
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Not all effects can be applied to all kinds of images. This is indicated by a grayed-out menu-entry. You may need to change the image mode to RGB (Image->Mode->RGB), add an alpha-channel (Layer->Transparency->Add Alpha Channel) or flatten it (Image->Flatten Image).
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(no translation yet)
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Located in
tips/gimp-tips.xml.in.h:14
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15.
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Pressing and holding the <tt>Shift</tt> key before making a selection allows you to add to the current selection instead of replacing it. Using <tt>Ctrl</tt> before making a selection subtracts from the current one.
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在選取區域之前按下 <tt>Shift</tt> 鍵，便會將新選擇的區域加到舊的區域一起而非代替舊的區域。使用 <tt>Ctrl</tt> 則是將舊的區域減去新的區域。
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Translated by
Chao-Hsiung Liao
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Located in
../data/tips/gimp-tips.xml.in.h:15
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16.
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The GIMP can undo most changes to the image, so feel free to experiment.
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(no translation yet)
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Located in
tips/gimp-tips.xml.in.h:16
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17.
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The GIMP supports gzip compression on the fly. Just add <tt>.gz</tt> (or <tt>.bz2</tt>, if you have bzip2 installed) to the filename and your image will be saved compressed. Of course loading compressed images works too.
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(no translation yet)
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Located in
tips/gimp-tips.xml.in.h:17
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18.
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The GIMP uses layers to let you organize your image. Think of them as a stack of slides or filters, such that looking through them you see a composite of their contents.
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(no translation yet)
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Located in
tips/gimp-tips.xml.in.h:18
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