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7. 「レイヤー」メニュー |  |
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7. 「レイヤー」メニュー | |
In GIMP, each layer has its own size that can be changed independently of the size of the image. This command changes the dimensions of a layer, but it does not scale its contents.
![[注記]](images/note.png)
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注記 |
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By default, painting outside the borders of a layer is ignored. You can, however, enable the Expand Layers setting in the Paint Tool Options, which will automatically extend the size of the layer when painting near one of its borders up to the size of the canvas. |
You can access this command
From the main menu through → .
From the Layers Dialog, you can access it through the command of its context menu.
This drop-down list allows you to pick a size from one of the available image templates. For more information on templates see Create a New Image or the Templates Dialog.
When choosing a template that has a different print resolution (ppi) than your image, two new buttons will appear that ask you how to adjust this.
will adjust the template to the ppi of the image; and will adjust the image to the ppi of the template.
ダイアログが開いた直後はこれらの欄に活性レイヤーの元の寸法が示されます。 いずれの値も数値記入欄で変更できます。 両欄を結ぶ右側の鎖のしるしが繋がった姿のときはどちらかの値を変更すると縦横比を保つようにもう一方の値が自動的に変更されます。 このしるしをクリックすると鎖は解かれ、 幅と高さを個別に指定できるようになります。
既定の単位はピクセルですが、 引き出しメニューで他の単位に切り替えられます。 たとえば元の大きさの百分率を を使って指定できます。
These coordinates are relative to the layer, not to the image. They are used to move a frame that determines which part of the layer content will be selected for the resized layer. In our example, the layer and the content have the same dimensions, and, of course, you have no frame to move. If you reduce Width and Height , the frame of the resized layer appears in the preview.
Besides the layer dimensions, a preview represents the layer with the frame of the resized layer. You can move this frame using the X and Y offsets and also dragging the cross-shaped cursor that appears when the mouse pointer moves over the layer area.
The button allows you to place the frame at the center of the layer.
This allows you to select how to fill the background of the layer when you increase its size. The same options are available here as in the Create New Image Dialog.
You can't make the size of a layer larger than the image canvas.
If the layer is smaller than the image, you can enlarge the Width and/or Height. If you want to enlarge the layer to the size of the image, it is easier to use Layers to Image Size.
If you want to remove unused parts of a layer, you can reduce the size.
図16.121 使用例
The selected layer for resizing
The frame representing the new layer size. It has been placed at the center of the layer using the button.
If the image has only one layer, it can be more convenient to use the Crop tool.
