The Play menu allows you to navigate through the file that is open in DVMP Pro. Navigation differs slightly depending on the type of file that is open.
For DV AVI, DV MOV and Raw DV files, you can start playback or pause it, frame step backward or forwards, and jump in either direction by 1 second or 1 minute increments. You can also jump to the previous or next scene.
For AVCHD, HDV, MOV, MP4 and MPEG-2 PS files, you can start playback or pause it, single frame step backward or forwards, and jump to the previous or next I-frame. It is not possible to jump between scenes so that part of the Play menu is greyed-out.
If an AVCHD, HDV, MOV, MP4 or MPEG-2 PS file is open, the Fwd 1 sec and Back 1 sec items are replaced with Fwd 1 I-frame and Back 1 I-frame.
These are also duplicated by keyboard hot-keys which are visible in the Play menu. You'll find the hot keys a lot quicker to use than the Play menu.