Home > Resize and Rotate
Do View > Resize Movie
A dialog window appears:
Rotation and Resizing are only supported in QuickTime and MPEG-4 formats.
If you rotate or resize an AVI or an MPEG-2 file, it will be taken into account if you save it as QuickTime mov. If you save it in native format (AVI, MPEG-2), rotation and resizing will be lost.