First off see Mark's great video on the 210EXT panel. http://www.youtube.com/watch?v=MaFnUm88rYc

But if you don't have 10 minutes or just want to print and tape this to the welder (edit whatever).

Press and hold the amp knob for 4-5 second until you see D01 on the display. Turn to the DXX setting and push to change each setting below. Two pushed to exit back to the main menu.

D01= N/A
D02= HF Arc start duration (.5-5 seconds)
D03= HF Arc start frequency (10-100Hz)
D04= HF Arc start amps DC (10-100 amps)
D05= HF Arc start amps AC (15-100 amps)
D06= N/A
D07= Lift start current DC and AC (10-100 amps)
D08= Torch trigger or amp control 4T function by type torch (00 = 4T 01 = 4T Normal)
D09= Voltage Reduction Device for MMA/stick (00 = VRD off 01 = VRD on)
D10= Pulse mode Standard or Advanced. AC is added to DC in Advanced mode (00 = Standard 01 = Advanced)