From appropriate fractional "invert the column" formations: Invert one more formation. Thus from columns do a 1/4 Invert the Column; from a 1/4 invert formation go to a 1/2 invert formation (i.e. to left-hand waves); from left hand waves go to a 3/4 invert formation, etc.
This definition is from SCVSDA Note Service by Bill Davis.
It is provided here for informational and educational purposes only.