User Modes

These are the available user modes you may set on your nickname. To set a user mode, you issue a MODE command with your nickname. For example, if your nickname was "SomeNick" and you wanted to set user mode +R on yourself, then you would type "/mode SomeNick +R". To unset that mode later, you would do "/mode SomeNick -R". Of course, these are examples - replace "SomeNick" with your own nickname when using these modes.

Flag	Title	Description
Modes that prevent certain messages
c	No Common Channels	Prevents users from sending sending you private messages with no common channels.
R	RegOnly	Only allows users who've identified to NickServ to be able to private message you.
Modes that add privacy
i	Invisible	Prevents you from showing up in a wildcard /who command. (Automatically set on connect.)
I	Private	Hides your channels and idle time in a /whois yourNick.
x	Cloaked	Hides part or all of your hostname. (Automatically set on connect.)
Other user modes
w	Wallops	Can receive wallops messages. These are rarely used except in cases where network services (Global) are offline. It is recommended to leave this enabled. (Automatically set on connect.)
S	Strip Color	Strips mIRC colour/bold/underline codes out of private messages to the user.
Modes only settable by services or servers
r	Registered	Only set by services. NickServ will set this on you automatically when you successfully identify to your nickname. It cannot be set/unset except by services.