When you have many products in your store it is always a great idea to add multiple categories to help organize your store, as it helps buyers who are looking for more specific items. To help you organize your categories you can sort them.
To sort in the order you wish the category listings to be visible on your store navigate to any product. Go to Artist>Manage My Products and select a product. Scroll down to Categories and select the edit icon next to any category.
Here you can edit the name if desired and change the sort order. The number you see will be the current sort order, simply change that number to reflect where you want this category to appear. If you would like it towards the beginning, give it a number 1.
Keep in mind there are 3 standard categories which are not editable - All, Best Sellers and New Work. These 3 categories will always appear at the beginning of all your custom categories.