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Look to the outline window under "Mesh". Notice that there are two types of meshing types on the geometry: a mapped face meshing and a face sizing meshing. The mapped face meshing restricts the type of element shapes that will be used in the mesh - in this case, quadrilaterals. The face sizing controls the size of the elements. The size of each element is limited to at most 0.1 inches^2square inches.
Sigma-r
Now, in the outline window, click Sigma-r.