Transitions Tab

In 2010 the Animations tab was split into two tabs (Transition and Animations).

Preview

Preview - Preview the slide transitions for the active slide.

Transition to this slide

Transition Scheme - gallery
Effect Options -

Timing

Sound - (Transition Sound in 2007)
Duration -
Apply to All - Set the transition between all the slides in the presentation to be the same as this slide.
On Mouse Click - Lets you wait until there is a mouse click before moving on to the next slide.
After - (Automatically After in 2007). Lets you move to the next slide after a specific number of seconds.