笔刷的不透明度，可以通过位于photoshop窗口上方附近调整选项条，进行调整。 笔刷调整选项可以在使用右键点击画笔栏后呼出。
The opacity of the brush can be changed from the option bar located near the top of the Photoshop window and the brush settings can be accessed by right-clicking anywhere in the document window.
在选项选择器中，单击表示要使用的画笔的形状。
In the Options selector, click a shape representing the brush you want to use.
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