Your usermode is an option string that is sent to the IRC network. It is composed of a plus sign ("+") followed by one or more letters, each of which represents an option. The letter "i" represents "invisible mode". When you are invisible, your nickname will not appear in channel userlists for people who are not in the channel with you. The letter "s" allows you to see server messages like nickname collisions. For a more complete list of available options, look up usermode on www.irchelp.org.
用户模式是发送到 IRC 网络的选项字符串。它由一个加号（“+”）和一个或多个字母组成，每个字母代表一个选项。字母“i”代表“隐形模式”。当您处于隐身状态时，您的昵称不会出现在与您不在频道中的人的频道用户列表中。字母“s”允许您查看服务器消息，例如昵称冲突。有关可用选项的更完整列表，请在 www.irchelp.org 上查找用户模式。