MythosPDF

Fix a typo in a LaTeX PDF

A single wrong letter is the most common reason to edit a PDF. Fixing it should change that letter and nothing else. This works on the PDF LaTeX exported, so you do not need the original file.

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How to do it

  1. 1.Open the PDF exported from LaTeX in MythosPDF.
  2. 2.Put the cursor on the wrong letter, delete it and type the right one.
  3. 3.Press Enter to save the line, then Export PDF.

How LaTeX writes PDFs

  • • pdfTeX embeds Type1 fonts such as Computer Modern.
  • • Kerning and ligatures are written into each line.
  • • Equations are built from many small pieces.

What that means when you fix a typo

  • • Body text and headings edit well; kerning is preserved around your change. Equations are best changed in the source and recompiled.
  • • LaTeX often uses fonts that are not freely available. Letters already in the PDF are reused exactly; for a letter it never used, MythosPDF asks before using the closest open font and tells you which one.

What happens to the rest of the page

  • • Only the words you touch are rewritten. The rest of the line keeps its exact position and spacing.
  • • If the correct letter was never used anywhere in the file, MythosPDF loads the complete font so the letter matches.

Questions people ask

+Will fixing one letter move the rest of the paragraph?

Only if the word gets wider or narrower. Then the words after it on that line shift by exactly the difference, and nothing else moves.

+Is it better to edit in LaTeX?

If you have the original LaTeX file and a lot to change, yes. For quick changes to the PDF itself, editing the PDF is faster and keeps it exactly as sent.

Other edits in LaTeX PDFs
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