Manually controlled transition??

I would like to do a slide show in which I control the transitions from one slide to another. Is this possible?

Thanks,

Romney

Open options on task bar, and selection General:Transistions. Unselect automatically add, or select a different transistion type for between images.

I have tried this but there does not seem to be an option for manual transition.I can only choose out of the existing duration & transition style.

Can you help?