4.6. 拡大・縮小

4.6. 拡大・縮小
	4. 変形ツール

The Scale Tool can be used to scale a layer, selection, path or image, depending on the Transform setting.

When you click on your image with the Scale tool, the Scale dialog is opened, allowing to change the Width and Height. When the chain icon is closed, adjustments to one, will adjust the other value the same percentage. If you do not want this, click the chain icon to disable the synchronization. The default size is in pixels, which can be changed in the measurement drop-down list besides the chain icon.

At the same time a Preview (unless disabled in the Tool Options) is superimposed on the object and handles appear on the corners and borders that you can click and drag to change the dimensions. At the center, a square with a cross inside can be used to move the preview.

4.6.1. 呼び出し方

There are different possibilities to activate the tool:

From the main menu: Tools → Transform Tools → Scale.
By clicking the tool icon in the Toolbox.
By pressing the Shift+S keyboard shortcut.

4.6.2. キー修飾 (初期設定)

Shift: Holding the Shift key down will toggle the Keep aspect option.
Ctrl: Holding the Ctrl key down will toggle the Around center option.

4.6.3. ツールオプション

図14.103 「拡大・縮小」ツールのツールオプション

Normally, tool options are displayed in a window attached under the Toolbox as soon as you activate a tool. If they are not, you can access them from the main menu through Windows → Dockable Windows → Tool Options which opens the option window of the selected tool.

変形対象, 方向, 補間アルゴリズム, クリッピング, Show image preview, ガイド

	注記
	これらのオプションについては変形ツールの共通オプションに説明があります。

	注記
	[レイヤーを対象とする]変形モードは活性レイヤーにしか作用しません。画像のすべてのレイヤーを対象にするときは画像の拡大・縮小を起用してください。

To scale a path, please refer to Transforming path.

Keep aspect (Shift)

領域枠の角ハンドルを移動するときに、このオプションはレイヤーの縦と横の比を保って寸法が変わるようにします。ちなみに辺ハンドルを移動する場合はこのオプションは無視されます。またちなみにダイアログ上では縦横の各欄を結ぶ鎖の印が連結に切り替わります。

Around center (Ctrl)

When this option is enabled, you can scale from center, radially if 「Keep aspect」 is checked, else vertically or horizontally.

4.6.4. The Scale adjustment dialog

図14.104 The Scale adjustment dialog

Width, Height: ここでは、任意に対象物体の幅と高さを設定できます。長さの既定の単位はピクセルですが、引き出し排列を使って変更できます。これらの値は画面上でハンドルを操作すると自動的に変化します。 2 つの欄を結ぶ鎖が切れているときは、幅と高さを個別に変更できます。
Readjust button: With this button you can reset the transform handles back to the original square shape, while keeping the current transformation and zoom level. This enables you to create more complex transformations by making the transformation in several steps.