How do you look at a video to edit frame by frame?
You can step through the Timeline, Frame by Frame, with the left-right cursor keys. Just make sure that you have clicked on the Timeline.
You can do it by clicking on the Video icon on the timeline. See attached screenshot.
You can also refer to http://help.adobe.com/en_US/premiereelements/using/WS73D3EEB8-4BEA-4e96-B629-B238E631CBD7. html
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