Select the Elliptical Marquee Tool (m) and make a selection over the divider line.

选择椭圆选框工具(M)然后在分割线上面画出一个椭圆。

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So grab your Rectangular Marquee Tool (m) right click on the image and select Color Range.

因此，抓住你的矩形选框工具(中)在图像上点击右键并选择颜色范围。

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Select the Rectangular Marquee Tool (m) and create two 1px lines on top of each other; the lines should be 850 pixels wide from the left guide to the right guide.

选择矩形选框工具(m)层叠的创建两个1px的线条；宽度为850px，从左参考线到右参考线。

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