'mids' <set> ['lin'|'gen'|'rem']This keyword is used correct the midside node-position of higher order elements stored in a set. It is performed atomatically if a new mesh is created or if nodes are projected to target surfaces. The correction will use a circular track defined by the corner-nodes and the midside node. With the parameter ``lin'' the corrected position is halfway between the corner-nodes for all inner nodes. Nodes on the surface are not affected by the lin option. The ``gen'' option will generate midside nodes for linear elements like he8 or te4. The ``rem'' option will remove midside nodes from the element formulation but the nodes are not deleted. The nodes are stored in a new set called ``-delete'' and the user might ``zap'' this set.