You can upload content for the page named below. If you change the page name, you can also upload content for another page. If the page name is empty, we derive the page name from the file name.
Well, it is easy: just visit the main page (like HelpOnSlideShows) of your presentation and hit Start.
You can use Slideshow and Wiki on the main page to toggle between:
DiaShow mode (large fonts for beamer presentation, uses a different CSS).
>>
next page
>>|
last page
<<
previous page
|<<
first page
^
up to main page