Here's a step-by-step guide to editing the print area in Set Variants:
Click the Add a New Customizable Product button on the right side. This will redirect you to the Shopify product list.
Edit the product by clicking Edit Print Area, then click the Set Variant button.
After choosing the variants, click the Edit Print Area button to define the print area for each variant.
Go to your store, click the Customize button for that product, and you will be redirected to the Designer App. Review the product — the print area for each variant will now be visible.
Congratulations! You have successfully edited the print area for each variant.