In the standard shop, you can create categories for your products. Categories will help you set your products by i.e. themes or colours and arrange your shop neatly.
In a designer shop (only premium shops ,) you can also define categories for designs.
To allocate a product to a category or to copy it from there, go to 'My Products'.; Click on the checkbox next to a product or several products and then select option 'move to category' in the drop-down menu. In an instant, a further drop-down menu containing your categories will appear right next to it.
If you want to make your shop categories visible for every user, you need to go to 'Shops' > '"Layout"' and activate option 'Display category name'.
To allocate a design to a category or to copy it from there, proceed as with product categories (see above).
When designs are allocated to a category, they appear when selecting them in the T-Shirt Designer or your shop.