Preview your Presentation
The preview area of the main window is where you can view your presentation before exporting it.
You can scrub to a particular time in your presentation by moving the Scrubber in the Timeline.
Pressing the "start/stop" button (
), which is just below the preview area, will play the presentation.
Editing features
The Preview area is also used to edit various aspects of your presentation:
You can resize, move, and crop the bounding rectangles of your clips directly in the preview area.
You can crop the overall canvas. This is one way to quickly focus on only one area of your screen for the duration of your presentation.