MODE <nick> <+|-><modes>
Usermodes: (* designates that the umode is oper only)
+i – Designates this client ‘invisible’.
+g – “caller id” mode only allow accept clients to message you
+w – Can see oper and server wallops.
* +o – Designates this client is an IRC Operator.
* +a – Is marked as a server admin in whois.
* +l – Can see oper locops (local wallops).
* +s – Can see server notices (see /quote help snomask).
* +z – Can see operwalls.
+D – Deaf – ignores all channel messages.
+Q – Prevents you from being affected by channel forwarding.
+R – Prevents non accept unidentified users from messaging you.