two slide transitions on one slide

Hi, you could apply a transition like 'Push' then select the 'Effect Options' and apply different animations, like 'From the top' or 'From the bottom' to match that scroll-up or scroll-down animation, but as far as I'm aware you can only apply one transition per slide.

What you can do though, is apply a 'Push' transition with 'From the bottom' to the next slide, so that when the user clicks the next button, they see that scroll-down animation, but rather than it occurring on the current slide, it happens on the next slide. Then for the opposite effect with the 'Back' button, create a copy of the previous slide and apply a 'Push' transition but 'From the top' so that the learner will see a Scroll-up animation. 

This does mean that you'll need copies of certain slides when you want that 'go back' animation, which can be a pain depending on how you've got the course setup, but this will allow you to have that scroll up and scroll down effect that you want.