The font you use is just as important as everything else. Get it wrong and your pitch will be a difficult read, or at the very least not inspire much enthusiasm in the reader.
I used to use FINAL DRAFT COURIER for everything I wrote until I came to the realisation readers spend their entire lives staring at that font. Your font doesn't need to be fancy, just clear enough to read. I wanted to give readers something different to look at, easier to read, which is why these days I use ARIEL in all my pitch document and treatments.
At the top of the page, centred, in bold, in capitals and font size 14, you need to put your TITLE - ALIEN. Below this (non capitals) you need to state the format and genre of your pitch - a sci-fi/horror feature proposal. Then below this 'by (your name)'.
The next line should be your Tagline, written in ITALICS, in font size 12 and captured in quotation marks - "In space no one can hear you scream!"
Then below that your Logline (written in a plain font size 12).
And finally below that your pitch (written in a plain font size 12 as above), containing a brief outline of the conflicts, characters and plot.
Your pitch will be selling your genre, so if your script is a comedy then your pitch should also be funny, a horror then your pitch should be tense and full of scares, etc. If your script is a comedy and you pitch isn't funny then it's not doing it's job.
The most important aspect of the One Page Pitch is to show conflict. Your protagonist must be in peril and you have to show this, especially the conflict with other characters. If you don't your pitch will be dull and flat. Show your protagonist bumping up against problems and obstacles, and make the reader really feel for his plight.
I've been guilty of this myself on many an occasion, but you should never end a pitch with a question - Will Ripley be able to defeat the Alien and escape home? You want your audience to ask this question, but not your reader. The reader needs the full picture, what happens and how the film or TV series plays out. If you don't tell them they'll think you don't know yourself and it'll go against you.
Add your NAME - EMAIL - PHONE NUMBER (or your agent's details) in the footer at the bottom of the page. It's OK to do this in Courier font as it's not part of the main document.
Here's an example of one of my pitches (copyright me of course) for reference only.
a 6 x 60 minute comedy drama TV series proposal
A middle aged man, disillusioned with being the sidekick of superhero Captain Cosmos, struggles to find himself as he juggles his family life and his secret identity, while looking to get the credit he thinks he deserves.
DAVID TUCKER has just turned 45 and he’s already smashed head first into his midlife crisis. By day he works as a traffic control officer and by night he becomes The Gnat, sidekick to the superhero Captain Cosmos. His landmark birthday prompts him to reevaluate his life, his job, his friends and family. It’s only then he realises he's completely lost.
David hates his job... both of them. He constantly struggles to keep his secret identity from his wife LUCY (42), who’s obsessed with aerobics, fad diets and is desperately trying to reclaim the body she had when she was twenty, and his son ALFIE (17) , who is uncommunicative and embarrassed by his parents on a daily basis. David’s trying to find himself again and thinks coming out from under the shadow of Captain Cosmos to become his own superhero is a much better idea than buying a powerful motorbike, falling off it at high speed only to watch it be totalled by a passing manure truck. But even branching out on your own can have its mishaps - like not being recognised by the police and being arrested for exposure when you’re trying to suit up in a phone box.
Millionaire IAN BAINES (44), aka Captain Cosmos, doesn’t understand and is too ignorant and self absorbed to notice his crime fighting partner isn’t happy with his life. Lucy doesn’t have time for her husband to give him the love and support he needs, and Alfie is too wrapped up in his raging hormones and his own burgeoning super powers to spend any time with his father.
The only one who claims he understands David is PROFESSOR DOOMSDAY (56), aka estate agent MARCUS WAINWRIGHT, turning him against Captain Cosmos, his wife and his son, taking him out drinking and generally leading him astray. But Professor Doomsday’s motives are far more sinister than simply turning David evil - he wants to destroy him, to bring him down so that he’s in no place to rescue his son Alfie. It is Doomsday’s dastardly plan to have Alfie become one of his minions and to join him in the crime of the century - stealing the Royal Family and replacing them with robots.
This is David’s journey to find himself once more, make it as a super hero in his own right, rekindle the romance with his wife, reconnect with his son and save him from the evil clutches of Professor Doomsday.