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# LATEX2e Summary sheet: updating old styles

Section references below are to LaTeX2e for Class and Package Writers.

1. Should it become a class or a package? See Section 2.3 for how to answer this question.

2. If it uses another style file, then you will need to obtain an updated version of this other file. Look at Section 2.7.1 for information on how to load other class and package files.

3. Try it: see Section 6.1.

4. It worked? Excellent, but there are probably still some things you should change in order to make your file into a well-structured LATEX2e file that is both robust and portable. So you should now read Section 2, especially 2.7. You will also find some useful examples in Section 3.

   If your file sets up new fonts, font-changing commands or symbols, you should also read LaTeX2e Font Selection.

5. It did not work? There are three possibilities here:
   - error messages are produced whilst reading your file;
   - error messages are produced whilst processing test documents;
   - there are no errors but the output is not as it should be.
   Don't forget to check carefully for this last possibility.

   If you have got to this stage then you will need to read Section 6 to find the solutions that will make your file work.

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