This is another fold that comes up somewhat often in origami.
2) Make a Valley Fold along where I have the black line.
3) Crease it well and then unfold it.
4) Now try to make another Valley Fold along the new line I’ve drawn.
5) As you make that second Valley Fold refold along the first crease you made.
6) Push everything flat.
7) The completed Swivel Fold.