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Subject: Re: Elisp - tag in list
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wael-zwaiter@gmx.com writes:

> Can people explain me the tag used in list below?
>
> (defcustom subinf-typeface-display '(-0.2 0.2)
>   :group 'tex
>   :type '(list (float :tag "inferior-glyph")
>                (float :tag "superior-glyph")) )

Do

M-x customize-variable [ENTER] subinf-typeface-display [ENTER]

try setting a value and the answer to your question should be obvious.