Screenplay Format for Kindle

Hi there -

I'm a new user to both Calibre as well as kindle. Does anyone have any instruction on how to take a screenplay formatted pdf and convert it in Calibre so I can then transfer it to kindle for easy reading? I tried it and while it will convert, the formatting is not perfect or ideal. Ideally, I would like to be able to use the font sizing function in kindle and NOT have to "zoom" into the text so that I continually move around screen just to read a page.

Truly appreciate it!