Select style for your Cards
Please navigate to Store tab > tap on Design > Branding > Styles.
You can choose Round or Square corners.
Select from different styles for Product cards
And also you can select side spacing. Control the distance between items and the edges of the screen.
Design settings on the example below:
Vertical tile banner - Side spacing 0
Small tile categories - Side spacing 0, Single row
Check out our guides for Logo/Favicon and Online store colors.