I would like to left-align equations in Auctex's preview's generated by preview-latex. I imagine that this would involve putting fleqn in the documentclass options in whatever latex file things are generated from.

How can I do this? I have tried to find this location but have not had much success.

  • Preview runs LaTeX with preview-LaTeX-command on the same files as the functions TeX-command-* do. For an instance, preview-document runs on the TeX-master document. So the difference really comes from preview-LaTeX-command.
    – Tobias
    Commented Oct 4, 2023 at 6:20
  • Note, putting fleqn into the class options of the actual document works for me.
    – Tobias
    Commented Oct 4, 2023 at 6:35

1 Answer 1


What about using align? You can use align as follows,

x &= y + z\\
\beta &= \alpha\gamma
  • I mean justifying the generated images to the left without altering the underlying text. this can be done in latex using the fleqn documentclass option
    – proverIdr
    Commented Mar 1, 2021 at 11:30

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