If you are not able to locate "Rotate" in the trim options menu, you may need to enable the Analysis Trimmer option.
 While the app is running, click Menu > Settings > Trimming Method > Analysis Trimmer. Once this is set, try the trim function again.
 The playback trimmer is faster at the expense of not being able to rotate the image during the trim process.
 The analysis trimmer is slower, however it gives you the ability to rotate any image which is not oriented correctly.

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