From ReefPedia

There are three levels of editing- please use the one you feel most comfortable with.

Easy as writing an email

• Click "edit" on a page and type in the text you want, or edit the text from someone else, as you see fit.

• Click "save"

• You're done! Now do it again.  :-)

Easy as posting in a forum

• Click "edit"

• Use the "=" sign to make headers. Like this:

   =This is a main header=

   ==This is a secondary header==

   ===This is a third-level header===

  ''this is italics'' 

  '''this is bold''' 

Advanced- Easier than HTML

See here: editing