Because Fountain is a plain-text markup standard, you need to use markup characters to format text. Wrapping something in single apostrophes makes it *italic*, double apostrophes **bold**, and underscores underline the text.
And of course, the common universal keyboard shortcuts work as well: ⌘cmd–B for bold, ⌘cmd–I for italic, and ⌘cmd–U for underline.
And don’t worry — the stylization characters are terminated at line break, so there’s no risk of having the whole document in cursive if you forget to close it. Also, a single asterisk/star won’t stylize anything, so this is totally OK:
They have claimed their family tree could be traced back to the Romans. (*
*) Editor’s note: we couldn’t
Centering Text
A paragraph surrounded by > and < is centered.
> I am centered <