Shuttle/Jog Button
Clicking this button switches the shuttle control button between shuttle and jog modes. When an "S" appears on this button, it is in shuttle mode. When a "J" appears it is in jump mode... just kidding, it's in jog mode. Shuttle mode will go ±10 times normal speed in increments of graduating increments of 0.1. Jog mode will go ± 5 times normal speed with increments of 0.1 per field.