The above is a level 6 header, which seems to be the highest level. Every level after that seems to be just a level 6 dupe.
There should be a dividing line above this.
The above should be a level 5 header. Neat.
Text under a level 4 header.
Text under a level 3 header.
Text under a level 2 header.
This is a test page, that every registered user should be able to make changes to.
I have edited this page.