-

Used to deselect channels selected using a Thru command. (Did that make sense?)

Example: 1 Thru 7 - 4 - 6 @ 50 Selects channels 1 to 7 but not 4 and 6 (1, 2, 3, 5, 7) and sets their levels to 50.

Using - and several other modifiers you can make a more complex range of channels