I'm working on a web solution that allows you to create a banner with a product from your online shop. The user will set his shop, we will crawl it and get all the products and display them in categories.
Now, the issue is that when the user has a lot of categories (because his shop is with a lot of categories) the list goes pretty long. When he has a category selected I show him the products in the right rectangle I want to keep as much space as I possibly can in the right rectangle (the grey one), so I can't use that space that much. What do you think?