Multiple Knuckle-Joint
Finger Movement Symbols

good-bye	why?	Hinge Unit Knuckle-Joints Hinge Open & Close Keeping Fingers Together The fingers move together in the same direction, as a unit. The knuckle-joints of the fingers open and close (bend up and down) together. This open-close knuckle movement is written with one row of small connected arrows pointing up and down.
fingerspell	typing	Hinge Trills Knuckle-Joints Hinge Open & Close While Fingers Alternate The fingers move in opposite directions. One moves up, as the other moves down. This is called alternating. This alternating knuckle movement symbol is written with two rows of small arrows pointing up and down.