As a reminder, look in the page structure panel for tips on what goes where, the elements that have 'resize' in the names are the ones you need to make taller/shorter depending on your design, you can use the dots or arrows or both, just delete what you don't want. If you delete the arrows make 'Slide Content - Resize' 100% wide.

It is complicated to add slides to this type of interaction, but relatively simple to remove them. To learn how to remove unneeded slides, watch this video: