This addon add three new buttons to the Dressing Room window that is displayed when you CTRL-Left Click and equippable item in your inventory or in the chat window.
Clear: remove all the equipment from the targeted character. Useful when you want to see a particular item without the clutter of other items or if you want to display pants on a character that is wearing a robe.
Self: target yourself for display in the Dressing Room window
Target: target somebody else for display in the Dressing Room window
The idea for the three buttons from the WoWEcon mod package. That package is a bit too heavy if all you want is to display the extra buttons so I extracted the code and create this very tiny addon to do them same thing.
I don't think it would be an issue but you should probably not use MoreDressUpButtons with WoWEcon.