Command - /NickServ SET AUTO
Usage   - /NickServ SET AUTO [ON/OFF]
This command automatically gives you your channel modes (+o/+v)
on all the channels you're currently on.
This is good for you if you usually identify after you join channels.
Note: You must be identified to NickServ in order to use this command.
Example(s):
/NickServ SET AUTO ON
/NickServ SET AUTO OFF