The environment alltt skips a line before and after its use. Is there a way to modify this behaviour to avoid these empty lines ?

*** Edit I tried to get inspired by a similar post about figure but I am a noob and don't really understand how to modify the answer.

1 Answer 1


Like most latex displays it is a list and so has \topsep spacing above it (note thiis is stretchable vertical space not really a blankline) You can set it to 0 eiether inline or in a \newenvironment definition


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to redefine alltt to always do this you can use

  • thanks, but this affect all the list-type environment then? is there a way to redefine the alltt environment (with \renewenvironment like in the mentioned question) to alter only alltt? Oct 14, 2016 at 17:32
  • @clemlaflemme as above it only affects this instance (note the {} group around the setting. simplest definition if you want lots of these is just \newenvironment{alltt2}{\setlength\topsep{0pt}\alltt}{\endalltt} Oct 14, 2016 at 17:40
  • the main thing is that I use knitr which produce .tex with alltt environments. That's why I'd like to redefine this environment, and not define to define a new one with another name. Oct 14, 2016 at 17:44
  • @clemlaflemme sigh, you could have said:-) I'll add something to the answer Oct 14, 2016 at 17:46
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    @clemlaflemme I added the saving of the end code, sorry, can't help with knitr Oct 18, 2016 at 8:29

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