A header provides a short summary of content
Headers may be oriented to give the hierarchy of a section in the context of the page
# First Header
## Second Header
### Third Header
#### Fourth Header
##### Fifth Header
Headers may be oriented to give the importance of a section in the context of the content that surrounds it
> Sizer Vertical Segment:
> > Huge Header:
> > Huge Header
>
> <!-- -->
>
> > Large Header:
> > Large Header
>
> <!-- -->
>
> > Medium Header:
> > Medium Header
>
> <!-- -->
>
> > Small Header:
> > Small Header
>
> <!-- -->
>
> > Tiny Header:
> > Tiny Header
A header can be formatted to emphasize an icon
> Icon Header:
> _Settings Icon_
> > Content:
> > Account Settings
> > > Sub Header:
> > > Manage your account settings and set e-mail preferences.
> Center Aligned Icon Header:
> _Circular Users Icon_
> Friends
Headers may be formatted to label smaller or de-emphasized content.
> Sub Header:
> Price
<!-- -->
> Span:
> $10.99