Honestech FOTOBOX Plus - Manual (Page 27)

27.
FOTOBOX™ PLUS
Time
– Use the Time button to adjust the Photo Time
(slide duration), and Transition Time (duration between slides) for all
photo slides in the Storyboard.
Note: Video Clips will not be affected by any Photo or Transition Time
adjustments.
You can change the duration of individual photo slides by right clicking
on one and accessing the „Set Duration‟ option from the pop-up menu