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11.
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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線上。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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12.
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You can drag a layer from the Layers dialog and drop it onto the toolbox. This will create a new image containing only that layer.
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您可以在「圖層」對話方塊中拖曳一個圖層並將之放進工具箱內。這樣會產生一幅只含有該圖層的圖片。
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Translated by
Chao-Hsiung Liao
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Located in
../data/tips/gimp-tips.xml.in.h:12
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13.
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A floating selection must be anchored to a new layer or to the last active layer before doing other operations on the image. Click on the "New Layer" or the "Anchor Layer" button in the Layers dialog, or use the menus to do the same.
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對圖片進行任何操作前，浮動選擇區域必須先固定在新的圖層或是最後使用的圖層上。要進行以上的程序，可以在「圖層」對話方塊中選取 "新增圖層」" 或 "固定圖層" 按鈕。另外在選單中也可以使用同樣的方法。
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Translated by
Chao-Hsiung Liao
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Located in
../data/tips/gimp-tips.xml.in.h:13
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14.
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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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GIMP 支援 gzip 直接壓縮/解壓。只要在檔名加上 <tt>.gz</tt> (或在安裝了 bzip2 的情況下使用 <tt>.bz2</tt>)，圖片會以壓縮狀態儲存。 當然直接打開壓縮圖檔也可以。
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Translated by
Chao-Hsiung Liao
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Located in
../data/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 and reviewed by
Abel Cheung
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Located in
../data/tips/gimp-tips.xml.in.h:15
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16.
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You can draw simple squares or circles using Edit→Stroke Selection. It strokes the edge of your current selection. More complex shapes can be drawn using the Path tool or with Filters→Render→Gfig.
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您可以用「編輯→依選擇區域描邊」來繪畫簡單的矩形或圓形。它會用畫筆描出目前的選擇區域的邊界。至於更複雜的圖形，可以使用「路徑」工具或者「濾鏡→描繪→Gfig」來繪畫。
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Translated by
Chao-Hsiung Liao
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Located in
../data/tips/gimp-tips.xml.in.h:16
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17.
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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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描畫路徑時（編輯→依路徑描邊），可以使用目前的繪畫工具和設定。您可以在漸層模式中使用「畫筆」，甚至「橡皮擦」或「塗污」工具也可以。
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Translated by
Chao-Hsiung Liao
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Located in
../data/tips/gimp-tips.xml.in.h:17
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18.
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You can create and edit complex selections using the Path tool. The Paths dialog allows you to work on multiple paths and to convert them to selections.
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您可以使用路徑工具來製作及修改複雜的選擇區域。在「路徑」對話方塊中，您可以同時處理多個路徑並將它們轉換為選擇區域。
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Translated and reviewed by
Abel Cheung
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Located in
../data/tips/gimp-tips.xml.in.h:18
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19.
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You can use the paint tools to change the selection. Click on the "Quick Mask" button at the bottom left of an image window. Change your selection by painting in the image and click on the button again to convert it back to a normal selection.
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您可以使用繪畫工具來更改選擇區域。按下圖片視窗左下角的 "快速遮罩" 按鈕。透過在圖片上繪圖可以更改選擇區域，然後再按一次按鈕可以將它轉換為普通的選擇區域。
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Translated by
Chao-Hsiung Liao
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Located in
../data/tips/gimp-tips.xml.in.h:19
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20.
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You can save a selection to a channel (Select→Save to Channel) and then modify this channel with any paint tools. Using the buttons in the Channels dialog, you can toggle the visibility of this new channel or convert it to a selection.
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您可以將選擇區域儲存為色版 (選擇→儲存為色版) 然後使用任何繪畫工具修改該色版。利用「色版」對話方塊的按鈕，您可以切換是否顯示這個新的色版或將它轉換為選擇區域。
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Translated by
Chao-Hsiung Liao
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Located in
../data/tips/gimp-tips.xml.in.h:20
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