Honestech VHS to DVD 2.0 Deluxe - Manual (Page 28)

28. honestech
This button allows you to control the volume of the movie playback.
When you have more than one movie clip in the storyboard, you can add special transitional effects.
Transitions can be added by dragging the transition effect into transition window between two clips.
This will open transition properties window as shown below.
Transition properties window controls the direction of the transition effect selected, and duration
length transition will take between clips.
Moving the scroll bar to plus will make the transitions slower, which will take longer for the transition
to take place. And moving the scroll bar closer to minus will take transition less time to occur, which
will make transition faster and quicker.