Originally Posted by
cashs_mom
You can also put a sleeve on the bottom of the quilt and put a wooden dowel in it. The weight will tend to keep the quilt hanging straight and flat.
@cashs_mom ... ditto ... exactly what I was going to suggest!
@Still Sew N ... You have some other good suggestions too.
It also could be a simple as "blocking" your quilt.
What I do, is spritz the quilt with water,
as I press it flat with my hands while pinning to my design wall.
That alone can often help get rid of the waves, if they are not too serious.