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I: is the movable disk of the device).
4 : Means that clicking can select files frontwards.
5 : Means that clicking can select files backwards.
6 : Means that clicking can activate to confirm the deletion of the current file picture.
7 : Means that clicking can play the current movie clips.
8 : Means that clicking can switch back to the previous photo mode (video mode).
9.2 Movie clips playing:
Click to pause playing, click to play forward, and click to play backward.