From a wave/line with ends in a mini-wave: ends Fold as centers Trade & Spread; original ends extend & Single Hinge. Equals Centers Trade ends Run, (new) centers Hinge.
Fold Out -- As above except that original centers don't Trade. Equals ends Run, (new) centers Hinge.
Guy Collingwood
This definition is from SCVSDA Note Service by Bill Davis.
It is provided here for informational and educational purposes only.
