First, paint a mask and then continue to select an effect that will only be applied to the masked areas.

首先，画一个面罩，然后继续，效果只会适用于这些带面具罩的区域。

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In effect, we're going to paint a mask that allows the original history state (that of having color) to show back through.

(正如其名历史记录画笔)实际上我们需要使用蒙版，以便重现源文件的色彩效果。

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We are now going to paint with this tool creating a mask revealing some of the image below.

我们将要用这个工具绘制一个蒙版，使得下面的图片显现出来。

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He built up the pigment into a thick mask of impasto, fusing the colors by blotting the paint with sheets of newspaper.

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