|Using long dritz pins that are about 2 inches and weaving them in and out the pattern piece and fabric edge works when trying to cut out difficult fabric, like knits, that likes to dance instead of just sit there.
Use a lot of pins so that almost all the edges are pinned down.
Yes, it's alot of work but gosh it's so much easier to cut.
Why has this taken me decades to figure out! I work knits almost exclusively and still am learning how to manage it.
Sewing knits is not for the weak!