The Relax Elements section of the Element Options dialog controls the following relaxation parameters.
Number of iterations. This is the number of iterations to perform during the relaxation process.
Interpolate Z from existing mesh. When this is turned on, the nodal Z coordinate is interpolated from the old mesh so that the contours do not change. When this is turned off, the nodal Z coordinates are not changed when they are moved.
Lock nodes on nodestrings.Preserve material boundaries when relaxing. Previous versions of SMS would lock any nodes on a material or mesh boundary. Starting with version 7.0 of SMS, nodes on these boundaries will slide along the boundary unless it is part of a nodestring and this option is turned on.
Area relax / Scatter relax. Relaxation will be based on either element areas or underlying scattered data.