I ruler fold, then stand my fabric on the shelf like the comic board users do. My shelves are 12" deep so I use my 8 1/2" wide ruler to fold on. Works great and I can get a lot more fabric on a shelf. I do have 2 pieces of cardboard that I use to open a place to put new fabric in. I can't see wasting space and money to leave folded fabric on. Just try different ways and do what works for you.