Once you’ve blurred the ellipse, cut the top half away from the divider by using the Rectangular Marquee Tool and deleting the area beneath it so that you are left with half an ellipse.
然后使用矩形选框工具删掉分割线上半部分，这样就剩下了半个椭圆。
Using the Rectangular Marquee Tool (M), fill a selection with white on a new layer as shown.
使用矩形选框工具（米），填充白色显示一个新的层中进行选择。
To start, choose the Rectangular Marquee Tool from the Tools Panel and create a rectangular selection using the following figure as a guide.
首先，请从工具小组的矩形选框工具并创建一个矩形选择使用为指导，如下图。
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