Add a layer mask to this layer as shown below, this will create a better lighting contrast for the hand and make this overall image look better.

按照下面的样子，添加一个图层蒙版，这样可以给整个画面增加整体光的对比度，画面看起来会更好一些。

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In the mobile environment contrast ratio takes on critical importance, as the lighting in vehicle and outdoor environments is not the typical subdued office lighting.

在移动环境下，对比度则更重要，因为在飞机上和室外环境中的光线不同于办公室的光线。

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This is in contrast to a stand-in who replaces an actor for non-filming purposes such as scene arrangement and lighting adjustments.

电影拍摄之前搭景以及调试灯光时代替演员到场的替身则叫做stand-in（光替）。

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As a result, the new cameras can remove red eye automatically, adjust an image's lighting to give it the appropriate contrast and give users tools to align and preview panoramic shots.

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In addition, in-camera High Dynamic Range (HDR) and D-lighting capture detailed images of high-contrast scenes, increasing creative possibilities.

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Screen contrast and brightness are easily adjusted for comfortable viewing in any lighting conditions.

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