Allow timed slides within an untimed presentation.
Useful for presentations that include a "Q&A" period or another time when the presenter needs to focus solely on the audience, but would like to continue showing pictures or diagrams at the same time.
It would be an added option from speaker view, which allows you to turn on the auto-slide timer in the middle of a deck.
I have the same need -- ideally I would like to set timer on a slide-by-slide basis. For instance, I might have the first 30 slides an a four second timer, have slide 31 with no timer so I have to manually forward when I am done speaking about it, and then have slides 32-45 on a ten second timer