This site allows HTML content. While learning all of HTML may feel intimidating, learning how to use a very small number of the most basic HTML "tags" is very easy. This table provides examples for each tag that is enabled on this site.
For more information see W3C's HTML Specifications or use your favorite search engine to find other sites that explain HTML.
Most unusual characters can be directly entered without any problems.
If you do encounter problems, try using HTML character entities. A common example looks like & for an ampersand & character. For a full list of entities see HTML's entities page. Some of the available characters include:
Lines and paragraphs are automatically recognized. The <br /> line break, <p> paragraph and </p> close paragraph tags are inserted automatically. If paragraphs are not recognized simply add a couple blank lines.
If you include a textual smiley in your post (see chart below), it will be replaced by a graphical smiley.
Content in [[double square brackets]] will be linked to existing content with that title, or a page to create that content. Links can contain an optional bar, "|". Content on the left of the bar is the target; to the right, the link shown. Links to pages outside this site are allowed. They must start with one of the following: "http", "https", "ftp", or "mailto", and can exist either by themselves, or on the left of the bar. Examples:
[[simple link]] - will go to the content titled "simple link" or a page to create that content.
[[this is the target|this is the source]] - will present "this is the source" as a link to "this is the target", or a page to create that content.
[[http://www.example.com|this is the source]] - will present "this is the source" as a link to http://www.example.com.
[[http://www.example.com]] - will present "http://www.example.com" as a link to http://www.example.com.
Content consisting of two or more capitalized words run together (aka "CamelCase") will be linked to existing content with that title, or a page to create that content.