I've been using Photostory for years now but with my 2023 Photostory Deluxe and can't work out for the life of me how to set the start and end points. I'm wanting to change the transition length of multiple photos and I think I need to set a start and end point to do this. I've tried bulk ticking but as soon as I click on the transitions box at the bottom of the photo, all the ticks disappear. I have over 600 photos & video clips in the project and the thought of setting the transition length one-by-one is really stressing me out! Any suggestions would be greatly appreciated. (I've emailed MAGIX about this and have had a response to my query about snap markers, but this transitions/start-end marker issue has yet to be addressed.)