Generating quadrilateral elements

Dear all,
I am interested in generating a quadrilateral elements mesh. As far as I know, Feflow can generate quadrilateral meshes only if all your supermeshes are quadrilateral. So, what would you suggest me if the boundary of my problem is not quadrilateral but I still want to use quadrilateral elements?
Thank you,
Julia

If you really want to use quads in such a case, you'd have to first subdivide your model area into quadrilateral supermesh polygons. Then FEFLOW will be able to generate a quad mesh.

Peter, thanks for your reply.
So basically, I will subdivide my model area manually into quadrilateral supermesh polygons.
If I find any way to do it more clever than that, I write you back.
Best regards