You may use the Page Up and Page Down keys to move through the text file.

你可以用Page Up 和 Page Down 键来移动文本内容。

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Also to refine that you can use the Page Up and Page Down keys to move frame by frame within the timeline, and adding shift to the mix moves you 10 frames either way.

你可以使用 Page Up 和Page Down 键来以帧为单位移动时间标尺，另外，如果想要更快移动，加按Shift。

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