Headlines are placed on a line of their own and surrounded by one to five equal signs denoting the level of the headline. The headline is in between the equal signs, separated by a space. Example:
== Second Level ==
Paragraphs are lines separated by empty lines or other block structures. This means
those lines
which directly follow each other
belong to one paragraph.
Preformatted text (e.g. a copy of an email) should be placed inside three curly braces ... :

First Line
...
Last Line

For better visual separation, horizontal lines can be generated by using four dashes.