This is a rough and ready guide to getting your pretty, properly-formatted script to appear as such when posted to these forums. (See example at end of this post.)
The trick is to use the script tag supported by the forum software. This displays anything between the opening and closing tags using a monospace font—usually Courier or similar.
If you're writing your script in a traditional text editor or word processor, you should be able to just paste the text into your post between the script tags.
However, if you're using a program like Screenwriter 6, you may find that it strips out all the layout information when you copy the script into the clipboard. To get around this:
1. Export your script as a plain text file. This format uses spaces to align the text, instead of tabs and retains the original script layout.
2. Open that script in a basic text editing program, such as Notepad (Windows), or TextEdit (OS X).
3. Switch back to your forum post and, at the point where you want to paste your script, type an opening "script" tag—the word script enclosed in square brackets.
4. Switch back to the text editor program and highlight the part of the script you want to copy into your forum post, select copy, then paste it into the forum post after the opening script tag.
5. Type the closing tag after the last line of the script: this tag is like the opening tag, but with a forward slash before the word script—/script—and also contained in square brackets.
NOTE: If you edit the post, you will need to re-paste the script into it to retain the original layout.
The result should look something like this:
INT. VICTIM'S LIVING ROOM - NIGHTVICTIM is sitting in an armchair watching TV. He's a
middle-aged chap, late thirties or early forties. He hears
footsteps behind him and turns towards the sound. We cut to
a POV SHOT from his MURDERER.The VICTIM looks up, surprised.
VICTIM
Who... who are you?MURDERER (O.S.)
I am your worst nightmare.VICTIM
Wha-? You don't look anything like
my mother!MURDERER
(sighs) Okay, fine! I'm your
second worst nightmare!We hear a GUNSHOT. The VICTIM slumps in his chair, his
blood slowly pooling from the gunshot wound in his head.MURDERER (O.S., to self) (CONT'D)
There, my beloved! He shall abuse
you no more!