stephen clegg

Is there a way within the 'customize slide synchronization' section to easily change the timing of a 'batch' of slides so they all change at the same time, leaving others within the same presentation to change at different times? For instance, I may want the first 10 slides to change after 3 seconds, then the next 5 after 6 seconds, and so on. (I'm trying to avoid manually going to each slide I want to have the same transition time and customizing each slide in turn.)