Just got a quick question about an astro spectra and the keypad (W4). In the picture I pointed out two keypad buttons. What do these do? I know on this Control head you select the modes using the rotory knob so what do the up and down arrows do? And what does F/R stand for?
Also, not pictured in this control head but I've seen some with a keypad button that is like a "0" with a line through it...what exactly is that?
Thanks guys!
