Hi Ellie's Nana,
Like you, I have the majority of my stash on shelves in the closet. I attached several "hook and loop" fasteners ($1 in the VALUE section at Joann Fabrics - lots of colors-I got beige to blend with shelving). Then I finished a muslin piece to size, attached hook n loop to it and connected the piece to the shelfing. When I started out I only has one shelf of fabric but I was optimistic and made the muslin to cover all 5 shelves. When I want to "see the fabric", I just unhook the muslin cover. When it is attached, it looks so neat and tidy. Happy sewing!