Click on the button with the slide name on it in the control bar to the right under “Slide types”
Review the slides available and click on the slide design you would like to have
Tips
Click on the overview (follow the arrow) to see the storyboard while you edit your script/slide.
If the slide designs don’t match your expectations, double-check what “Content Type” the text is classified as. The Content-Type classification controls what slide designs that will be available.
If you want to use different slide designs for your different text sections, hit Enter twice to create a new block.
Create a Storyboard and get access to all slide types available in the Storyboard editor (If it's included in your license).