To access pre-loaded card design sets, add an image to the card and select Layouts from the top toolbar.
Click on the Open button next to "Design Library" at the bottom of the Layouts window.
In the Design Library Window, click on the Card Designs tab to access card sets.
Card design sets can be filtered by category under the "Type" drop down.
To install, hover the cursor over a set and click on "Choose" and the design and overlay components will download to your Layouts.