=​=Headline=​= (2 equals signs) soley on a line gives
Headline
'​'italic'​' (2 apostrophes) gives italic.
'​'​'bold'​'​' (3 apostrophes) gives bold.
*​*masked*​* (2 asterisks) gives masked and reveals the text when hovered with the mousepointer.
Italic, bold and masked can be nested.

I copied this from a post in the formatting thread.