If you know HTML or CSS formatting commands, they can also be used in this wiki. One useful HTML command is which creates a line break. Another useful one is , which hides the text, so that it is only visible if you are editing, or if someone is viewing the page source. For example, I can type , and it will become: . Sometimes, these can be used for writing messages to the other editors, without it being visible to visitors. If you want to show what a command looks like, rather than actually implementing the command, surround it with the nowiki command.