Under TeX, when I write a line too long, it prints a fat black box at the end of the line. That is probably a feature, but I dislike it.

How to turn that OFF? Is there a command-line option or something else?

I usually use LaTeX, but I have a complicated file which happens to be plain TeX.

  • 6
    Don't fight the consequences, eliminate the cause. Nov 12 '11 at 22:02

Since you are using Plain TeX, the answer is


before the text starts.


I think the draft option, as mentioned by Alan, works with LaTeX classes. Try to set \overfullrule=0pt in Plain TeX.

See The TeXBook.

  • 1
    I don't think that PDF is legal.
    – egreg
    Jul 7 '11 at 17:48
  • 1
    Indeed, while the source code of The TeXBook is on CTAN creating and sharing PDFs from it is not allowed by the copyright holder. A good free alternative is TeX for the Impatient (PDF on CTAN or texdoc impatient). For \overfullrule see page 170 (PDF page 190). @egreg
    – Martin Scharrer
    Jul 7 '11 at 18:10
  • @Martin: I didn’t know that. Thanks for your edit :-)
    – Tobi
    Jul 7 '11 at 22:41

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