Rehearse timing

This function can be described as follows:

This feature is to enhance ease of use with slideshow .In order to apply customized slideshow time in rehearsal mode to following presentation. An slideshow control window is added to support that requirement .User can customed sequences and duration for each of slide, and then apply it to following slideshow.
[http://wiki.services.openoffice.org/wiki/Image: Rehearse timing .odt the Specification of this new feature]