Having the ability to add points of interest is great, but what if you make a mistake or need to edit or delete an existing entry?
可以添加感兴趣的地点的确不错，但是如果输错了地点，或者需要编辑或删除已有的条目，又该如何呢？
Add anchor point Tool and Delete anchor point Tool are fairly obvious and the Convert point Tool lets you to redefine the anchor points and give a smooth corner.
添加锚点工具和删除锚点工具的作用很明显了，转换点工具允许你重新指定点的类型，以获得一个平滑的转角。
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