Rather than forcing the user to understand the file system to achieve her goal, a simple Abandon Changes function on the main menu would suffice.

我们不能强迫用户理解文件系统，从而实现他们的目标，只要在主菜单上放一个简单的放弃修改功能就足够了。

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That three-inch screen is big, if not particularly bright, but does the trick for the camera's fairly simple menu system, which also includes a number of filters like Fisheye, Sepia (move over Instagram) and Monochrome -- the processing on each occurs after the photos are snapped.

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