Course presentation with Dialogue cards

For the first time, I just tried to create a set of dialog cards inside a course presentation, but the result isn't so impressive:
even without images on the cards, it's practically impossible to display the cards without the need for an up/down scrollbar as they overflow the height of the course presentation container. 

In the name of usability, any chance you could tweak the height of the dialog cards when in the context of course presentations? (- or even better, allow creators to set the dimensions of the cards to suit them)

Thanks.