Another thing that Selling page material pull down selector needs is the ability to select more than one material at a time. The way it is now you need to constantly re-click the pull down to keep adding another material. (The control key does not appear to let you add multiple materials within one drop down.) If you are adding 20 materials you need to do this with 40 mouse clicks! (Maybe it's an April Fool's joke?) Another approach is to have an option to activate all materials and afterwards deselect the ones you don't want to sell in the list that is generated.