The Video Preview Window

Choose View | Window | Video Preview to toggle the display of the Video Preview window.

The Video Preview window displays a project's video output at the current cursor position during editing and playback. The playback includes any effects that you have applied to it. This window is also useful when editing frame by frame for synchronizing audio. Right-click anywhere in the window to display a shortcut menu with Video Preview window options.

For more information, see Using the Video Preview window