ETDELE, ITYP1, ITYP2, INC
Deletes element types.
ITYP1, ITYP2, INCDeletes element types from ITYP1 to ITYP2 (defaults
to ITYP1) in steps of INC (defaults
to 1). If ITYP1 = ALL, ITYP2 and INC are
ignored and all element types are deleted. Element types are defined with
the ET command.