Cómo especificar la brecha entre las entradas del índice

Question

El código

\documentclass{book}
\usepackage{imakeidx}
\let\cleardoublepage\clearpage
\makeindex
\usepackage[itemlayout=singlepar]{idxlayout}

\begin{document}
\LARGE

This is the first paragraph.\index{AA! first}\index{AA! second}\index{AA! third}

This is the second paragraph.\index{AAB! an entry}

This is the third paragraph.\index{AAC! another entry}

\idxlayout{columns=1}
\printindex
\end{document}

produce el índice:

¿Cómo puedo especificar de antemano la brecha (digamos, 5 puntos, 10 puntos, 12 puntos, etc.) entre AA y AAB? entre AAB y AAC?

Answer 1

Redefina \@idxitempara agregar algo de espacio vertical.

\documentclass{book}
\usepackage{imakeidx}
\usepackage[itemlayout=singlepar]{idxlayout}

\makeindex

\makeatletter
\renewcommand{\@idxitem}{\par\addvspace{\medskipamount}\hangindent40\p@}
\makeatother

\begin{document}

This is the first paragraph.\index{AA! first}\index{AA! second}\index{AA! third}

This is the second paragraph.\index{AAB! an entry}

This is the third paragraph.\index{AAC! another entry}

\idxlayout{columns=1}

\printindex

\end{document}