To select products or categories for your design in Cropink, you'll first need to navigate to the "Designs" tab and select the specific design you want to work with.

Once you've chosen the design, locate the "Filters" section and click the arrow next to either:

Simply paste the list of product IDs or categories you want to connect with the design and hit "Save". To update your feed right away, go to the "Settings" tab and click "Update Now".