I've created a macro which highlights a word and sends it to the index
\newcommand{\indexthis}[1]{\textcolor{Maroon}{\textbf{#1}}\index{\MakeLowercase{#1}@{#1}}\xspace).
However the \MakeLowercase command does not appear to work as words which appear at the beginning of the sentence are sent to the .idx file with the capital letter in place. This then affects the sort order of the index as the capitalised words come first. Here's a minimal worked example
\documentclass{minimal}
\usepackage{makeidx}
\usepackage[usenames,dvipsnames,svgnames,table]{xcolor}
\newcommand{\indexthis}[1]{\textcolor{Maroon}{\textbf{#1}}\index{\MakeLowercase{#1}@{#1}}\xspace}
\makeindex
%================================================================================================
\begin{document}
\indexthis{Aardvarks} keep out of the sun \\
\indexthis{Badgers} prefer the shade \\
But \indexthis{antelopes} adore sunshine \\
And \indexthis{lions} are sun addicts \\
\printindex
\end{document}
And here is a screenshot
The problem is that we have two A-Z lists, one for words which begin with uppercase letters, and one for words which begin with lowercase letters. Can anyone make changes to the macro to force the argument #1 into lowercase before sending it to the .idx file? Alternatively is there a way to get makeindex to ignore capital letters during sorting? Ta.
(NB there's a thread Applying \lowercase to index entries which deals partly with this issue. However, the solution is a macro containing two arguments. I'm trying to both highlight and add to the index using only one argument, and I haven't been able to adapt this code)
Best Answer
Perhaps
(deleted xspace as it is not needed here as the macro call ends with
}so does not drop spaces)