When choosing the way you want to layout your TV app, you can choose from: Standard Grid, Jumbo Grid, and Detail View. You'll choose each section theme in Experience Creator under "Edit Design."
Jumbo Grid: This is great for showing off Titles and visual aspects that need a bigger layout.
Standard Grid: This is a good choice for a Section that has lots of videos - easier to get a wholistic view of options.
Detail View: Detail view is a great choice for episodes or specific films, anything that requires a description.