This soft knit looks almost identical on either side. The material is so thin my water-soluble marking pen bleeds right through and my chalk pencil requires too much pressure, distorting the fabric. So I use medical tape! It doesn’t leave any residue and stands out. You can also write on the tape with a Sharpie but anymore I just keep my tape marks consistent–always on the wrong side of the fabric. I also keep my crafting scissors handy so my Kai scissors maintain their edge.
This is such an easy trick and it saves a lot of time when it comes time to pin pieces together.