Navigate through the folders until you find the coordinate system you want, then click it.

浏览整个文件夹直到找到你要的坐标系统，再单击它。

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Click "backdrop", choose the right backdrop of this story. Then click it.

单击“背景”，选择符合故事情节的“背景”。找到合适“背景”后请单击它。

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Click "backdrop", choose the right backdrop of this story. Then click it.

单击“背景”，选择符合故事情节的“背景”。找到合适“背景”后请单击它。

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