Mesh Display toggles the visibility of the STL mesh on the component. Mesh Edges toggles the STL edges on the mesh display. The mesh depicts what would result in the printed model. To change the Mesh Display and Mesh Edges use the Printer Options.
to display the tessellated mesh. Mesh display must be selected to enable mesh edge display. 
to display the tessellated mesh edges. Mesh Display must be active to enable mesh edge display. 