Go to Add-ons > choose Categories next to Add-ons. Click on New category to add a new category. Fill in title and subtitle. Add excisting items to your category by clicking Add. To change the order of how the items appear, click on the arrows.

Go to Add-ons > click the plus sign to add a new. Fill in name, price, VAT and give your add-on a description > click Save. The ability to add an image becomes available. Find your image, click on it and hold in the left mousekey as you drag...