Yes, to view multiple design variations you will need to add a line item to your cart for each variations. For example, if you want to see your design with a red, green and blue background, you would add 3 items to the cart with the corresponding artwork and instructions for each.
We will create proofs for each line item that you can view on our site. You can request to cancel any of the line items you do not want after viewing the proofs. This will remove these items from your order so that you will only be charged for the designs you explicitly approve.