图层混合属性模式设置成覆盖，然后用画笔工具，选白色，然后去画想要去除紫边的区域。

Set the blending mode to Overlay. With the brush tool, paint white in the mask where you want the correction to occur.

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紫骝马还认得旧时游玩路迹，嘶叫着跑过了画桥东边路。

Purple Steed, you know the old paths; neighing you cross a painted bridge on the way across the eastern Banks.

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