Yes, small pieces across the front. I find this quicker than pinning. DON'T go cutting one up until you try a small piece! I always use the snappers on the back. It depends on how long my backing is as to what I do on the front.
if i have just a small amount of extra backing, I pin. If lots, I use the snapper pieces. The small pieces may bump against the edge of the machine, especially if you are using a ruler base.