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I'm using the gb4e package to enumerate examples in a paper, but in the footnotes I need to enumerate with roman numerals in small letters (i.a), (ii.b), etc. not in small capitals (I.a), (II.a), etc. I have already read that by with \xlisti one can do this, but in the compilation it doesn't work, instead it produces roman numerals in small capitals.

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    Welcome to TeX.SX! Could you please add a small example of code? – egreg Dec 23 '15 at 0:05
  • It's not clear to me what format your footnote examples should look like. What should (i.a) be vs. (ii.b)? This format doesn't make a lot of sense as stated. gb4e is quite limited in its customization abilities, so if you only need this in footnotes a regular enumeration using the enumitem package might be simpler. But without more information it's hard to tell. – Alan Munn Dec 23 '15 at 0:14
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It's not difficult to redefine the footnote example counter to be \roman. But the formatting of the subexamples isn't totally clear to me. The standard way gb4e formats them is that the main example is in parentheses and subexamples are in alpha-enumerated lists. Here's an example:

\documentclass{article}
\usepackage{gb4e}
\makeatletter
\renewcommand{\thexnumi}{\if@noftnote\@xsi{xnumi}\else\roman{xnumi}\fi}
\makeatother
\begin{document}
\begin{exe}
\ex An example
\end{exe}
Some text \footnote{These are some examples in a footnote:
\begin{exe}
\ex\begin{xlist}
\ex A footnote subexample
\ex A footnote subexample
\end{xlist}
\end{exe}
\begin{exe}
\ex Another footnote example
\end{exe}
}
\end{document}

output of footnote formatting

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