Why would LaTeX ignore the font size in the documentclass

Posted by Rory on Stack Overflow See other posts from Stack Overflow or by Rory
Published on 2010-04-15T09:34:06Z Indexed on 2010/04/15 9:43 UTC
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I have a LaTeX file. I'm experimenting with trying to reduce the font size (this is related to my other question here http://stackoverflow.com/questions/2636647/latex-changing-the-font-size-for-a-document-but-in-the-preamble-not-the-docum ).

The LaTeX file is generated from another programme. I have edited it to start with

\documentclass[4pt,a4paper,english]{report}

i.e. I am trying to make the text really small. However it doesn't work. I change that 4pt to anything and the font size is the same.

When running pdflatex on it, I get this message printed out.

LaTeX Warning: Unused global option(s):
    [4pt].

That might explain why the error message is

What could be going on here? How do I make it use the font size in the documentclass definition?

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