To select pinned, pre-made, or download more designs, select "Layouts" from the top toolbar.
Or click on "Design Library" from the top menu.
Under layouts, you're pinned and previosly downloaded designs will be available to select or choose "Download Pro Designs" for more layouts.
In the Design LIbrary, click on the "Card Designs" tab and select the drop down nex to "Type" to filter by category: Baby, Holiday, Save the Date, etc...
Hover the cursor over any design to select and install to your layouts section. Designs with an infinity symbol will require a Pro Enhancements subscription to access.
To learn more about Pro Enhancments features and how to subscribe, click here.
Watch the Card Designer tools tutorial here.