Probably you are looking a man page that doesn't match what you are running, this was removed in favour of just having separate prefix/prefix2 options a while ago.
On Mon, Aug 06, 2012 at 02:20:35AM +0200, LEVAI Daniel wrote: > Hi! > > > I'm trying to digest tmux's man page's statement, that it is possible to > configure more than one prefix key, and each one will work individually. > > Now when I execute 'set-option -g prefix ^b,^a', I get "Bad key: ^b,^a", > what is somehow understandable. But I can't seem to figure out a > variation of escaping/quoting and/or separating the prefix keys to make > tmux accept them. Is this some future feature which accidentally made it > to the man page? > > > Thanks, > Daniel > > -- > L?VAI D?niel > PGP key ID = 0x83B63A8F > Key fingerprint = DBEC C66B A47A DFA2 792D 650C C69B BE4C 83B6 3A8F
