[Elecraft] can not seperate vfo a & b on 20m

[goldtr8 at charter.net]

Somehow I locked the VFO A & B together for 20m only.

If I change frq on VFO A I have VFO B track but only on 20 M.   I am 
searching the manual but I can not figure how I turned this on, as VFO B 
is independant on the other bands.

So I know there is a setting to have this tracking feature but I want to 
turn it off and I cant find the magic switch.

Thanks
Don

~73
Don
KD8NNU