I use the carpet, easier on my knees :wink: I place one of those flat glass marbles (used in vases for floral arrangements) underneath the backing. It slightly raises the area so I can pin it easily. I just gently slide it around where it is needed :D:D:D
Starching the backing first really makes a big difference, and also slightly stretch out the backing when you pin it to the carpet or tape it to the floor :D:D:D