With my Teflon pressing sheet, the pieces are temporarily fused on top of the sheet. The placement sheet is underneath so you can see it through the Teflon sheet. You may need to go over your placement sheet with a black sharpie if it isn't dark enough to see through the Teflon sheet. Once all the pieces are fused to the Teflon pressing sheet, you carefully peel it off in one large applique and place it on the background fabric and fuse it once you get it placed correctly. If you use a light background fabric, you can use the placement sheet underneath the background fabric to get it in the right spot.