It appears we have lost a nice capability in the slideshow feature in PD7 that we had in PD6. For some reason one can not extend the duration of slideshow when completed like we could in PD6. I understand if the show was fitted to music but do the following:
1) Drag several pictures to the timeline
2) Create a cell slideshow with just default settings (i.e. no music, timeline order for pictures)
3) The duration of the resulting clip in the timeline can not be extended by dragging or "set duration" which is grayed out. Strange, we could in PD6
If one wants to change the slideshow duration in PD7 you need to throw in some form of music that you have trimmed, fit photo's to music during slideshow creation and then mute the resulting slideshow clip. Rather inconvenient.
Jeff