I press to the side...when you do that there is a "high" side and a "low" side. The "high" side is the side where you are stitching over three layers of fabric...Anyway, I was told to stitch in the ditch on the "low" side but keeping the needle against the "high" side. Sort of like just letting your tire of a car ride along just against a curb. This way you really can not see the seam...OK, got to admitt....I occasionally will ride right up on the curve...but I try