Sorry to disagree a bit there I don't think there's any real format required for a PS. My Barrister used to say he sometimes just called them "Note" and it was literally just a couple of pages of double line spacing. Personally I wouldn't narrow the margins much.
All it needs at the top is your name (Father) and case number then the heading position statement. It is much more informal than a final statement and with something that short, you don't normally need headings. It should flow and be quick and easy to read with the points clearly made. It can help to think of it as something you would speak out loud to say to a Judge, to get it to flow. Once you;ve done it a couple of times it becomes much easier.
All it needs at the top is your name (Father) and case number then the heading position statement. It is much more informal than a final statement and with something that short, you don't normally need headings. It should flow and be quick and easy to read with the points clearly made. It can help to think of it as something you would speak out loud to say to a Judge, to get it to flow. Once you;ve done it a couple of times it becomes much easier.