I want to use displayed style for inline math, i.e. \everymath{\displaystyle}, but the line space is too tight when, for example, fractions appear in consecutive lines.

I want to change this via \lineskiplimit and \lineskip, like this


then I find this setting affects line space in displayed multiline, such as

  \frac{2}{2} &= \frac{2}{2} \\
              &= 1 \\
              &= 1 \\
              &= \frac{2}{2} \\
              &= 1 \\
              &= \frac{2}{2} \\
              &= \frac{2}{2} \\
              &= 1


enter image description here


enter image description here

So I have 2 questions:

  1. how to avoid affecting line space in multiline displayed math
  2. how to replace 5pt by minimal line skip in multiline displayed math, eg. the vertical space between two \frac{2}{2} in the first image
  • using \lineskip to space lines in a paragraph should be a last resort, it by design produces irregular line spacing. It is much better to increase \baselinskip so that \lineskip is never used. Apr 6, 2022 at 18:44

1 Answer 1


After reading some books on plain TeX, I understand that when entering displayed math mode, there is a command \openup, which increases \baselineskip, \lineskip, \lineskiplimit by one \jot, which is 3pt by default. So I'm going to use the following code to emulating the behavior


If there are something besides display math mode also changes \lineskiplimit and \lineskip, it will cause unexpected result.

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