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7.
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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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並非所有效果都適用於各類圖片。當某項功能無法使用時，選單的文字會以淺灰色表示。如果需要該種效果，可能需要將圖片的色系轉為 RGB (圖片→模式→RGB)、加入透明色版 (圖層→透明度→新增透明色版) 或者將它平面化 (圖片→圖片平面化)。
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Translated by
Chao-Hsiung Liao
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Located in
../data/tips/gimp-tips.xml.in.h:7
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8.
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You can adjust or move a selection by using <tt>Alt</tt>-drag. If this makes the window move, your window manager uses the <tt>Alt</tt> key already. Most window managers can be configured to ignore the <tt>Alt</tt> key or to use the <tt>Super</tt> key (or "Windows logo") instead.
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按 <tt>Alt</tt> 鍵再用滑鼠拖曳可以調整和重新放置選擇區域。如果這個組合令視窗移動，即表示視窗管理程式已經使用了 <tt>Alt</tt> 鍵。大部分視窗管理程式可以設定為忽略 <tt>Alt</tt> 鍵，或是使用 <tt>Super</tt> 鍵 (或「Windows logo」) 來代替。
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Translated by
Chao-Hsiung Liao
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Located in
../data/tips/gimp-tips.xml.in.h:8
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9.
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You can drag and drop many things in GIMP. For example, dragging a color from the toolbox or from a color palette and dropping it into an image will fill the current selection with that color.
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GIMP 裡面很多東西都是可以拖曳的。舉個例子，從工具箱或色盤裡拖曳一種顏色出來並放到圖片上，會將目前的圖片或選擇區域填滿該種顏色。
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Translated by
Chao-Hsiung Liao
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Located in
../data/tips/gimp-tips.xml.in.h:9
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10.
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You can use the middle mouse button to pan around the image (or optionally hold <tt>Spacebar</tt> while you move the mouse).
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您可以用中央滑鼠按鈕抓住圖片在視窗內移動（或選擇在移動滑鼠時按住 <tt>Spacebar</tt>）。
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Translated by
Chao-Hsiung Liao
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Located in
../data/tips/gimp-tips.xml.in.h:10
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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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