ArcSoft SHOWBIZ 2 - Manual (Page 36)

Chapter 3: Edit
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3.7 Transitions
Transitions are special effects that can be inserted between video
clips or still images on the Storyboard/Timeline. In the Transitions
tab, choose your transition from the available categories, then
click the arrow to add it to the Storyboard/Timeline.
The available options for a transition vary depending on the type
of transition you choose.
On the Storyboard/Timeline, click and drag a transition to
reposition it. On the Timeline, click and drag the edge of a
transition to alter the display time.