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Asked: 2026-05-23T14:22:29+00:00

Some of the arguments in the emacs lisp function contains the keyword &optional where

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Some of the arguments in the emacs lisp function contains the keyword &optional where to find the documentation of those keywords. I tried searching using describe-function and describe-variable without sucess.

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  1. Editorial Team

    I found the reference to &optional in the elisp manual of my Emacs24 (dev version).

    Look in info C-h i m elisp RET m functions RET go to the second entry Lambda Expressions then Argument List.

    &optionalis described in the third paragraph.

    And it can be found online here.

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