It would be great if we could apply partial elastic surface support to a panel by using a contour. There are many cases when dealing with concrete slab on grade design to have the ability to either vary the subgrade modulus over an area. When doing P.T. slab on grade design, one needs to only have a portion of the slab supported, thus the current surface support will not work. As far as implementation, being able to draw this in as a surface load on a contour would be great. For a variable modulus, one could use the 3 point contour.