For a different approach score area of the fabric that will become the crease before you even fold it over.
Iron vinyl fabric fold.
Creative possibilities are endless with heat transfer vinyl.
Repeat on all four corners.
It is always important to let the iron heat up before pressing this way you will know from the start whether the iron is too hot and can avoid surprises like the iron heating up halfway through pressing and melting the fabric.
Make sure to keep the heat some distance from the banner or tablecloth.
Fold the edges to the inside and carefully use the tip of your iron to fuse the vinyl to itself.
I made mine a wee bit too small.
Make sure to keep the edge of the iron on the folded edge of the fabric and not on the vinyl itself.
Then using the end of a small screwdriver gently score a line on the fabric all along the intended crease.
Sewing vinyl like sewing with other fabrics can require seams to be pressed in a certain direction.
To do this mark a line on your fabric where the crease of the fold should go.
The first thing to note is that you need to make sure neither the hair dryer nor the iron comes into direct contact with the vinyl material.