It appears as if the background graphic expands to fill the region.
这看起来就像是背景图像扩大到整个区域。
You can use an image, or a graphic for your background or you can also leave it plain and simple.
你用一幅图片，或者一幅图形来作为你的背景，或者你也可以让它变空缺和简洁。
Made the background of open folders translucent. Also fixed a small visual glitch in open folders' header graphic.
文件夹背景透明。同时修正了一个打开文件夹时顶部图形绘制的小错误。
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