[Elecraft] [K3] Unprogramming a programmable key?

[Jim Miller]

I looked through the Users manual and the PRM and couldn't find how to
unassign a macro that had been assigned to e.g. PF2. I nulled it by
assigning a blank macro to it. Of course now when pressed it does nothing
other than indicate "Macro 3"

Is there another way?

Thanks

Jim AB3CV