Using same margin-settings in acronym as in listoffigures

Question

As the two pictures show, the first entry of listoffigures begins further to the right than in the case of my list of abbreviations. Is it - and if yes, how - possible to retrieve the margin-settings used in the listoffigures-environment and to apply these to the acronym-environment?

MWE

\documentclass{scrbook}

\usepackage[demo]{graphicx}
\usepackage{booktabs}
\usepackage{imakeidx}
\makeindex

\usepackage{acronym}

\begin{document}

\chapter*{List of abbreviations}
\begin{acronym}
\acro{3PL}{Third-party logistics}
\acro{APS}{Advanced Planning and Scheduling}
\end{acronym}

\listoffigures

\chapter{First chapter}

\section{Section}

    \begin{figure}[htbp]
       \centering
       \includegraphics{example.png} 
       \caption{example caption}
       \label{fig:example1}
    \end{figure}
    \index{Figure!Example1}

\end{document}

Answer 1

You can go with xpatch and enumitem, since the package realizes the list of acronyms as a description environment:

\documentclass{scrbook}

\usepackage{xpatch,enumitem}
\usepackage{acronym}

\xpatchcmd{\acronym}{\begin{description}}
 {\begin{description}[labelindent=1.5em]}{}{}

\begin{document}

\chapter*{List of abbreviations}
\begin{acronym}
\acro{3PL}{Third-party logistics}
\acro{APS}{Advanced Planning and Scheduling}
\end{acronym}

...

The amount of indentation in the list of figures is stored in the macro \l@figure which usually has a definition such as

\@dottedtocline {1}{1.5em}{2.3em}

If you use a class where the definition is this, then a workaround to avoid guessing the length is as follows

\documentclass{scrbook}

\usepackage{xpatch,enumitem}
\usepackage{acronym}

\newlength\lfigureindent
\xpatchcmd{\acronym}{\begin{description}}
 {\begin{description}[labelindent=\lfigureindent]}{}{}
\makeatletter
\def\get@l@figure@indent{\expandafter\get@l@figure@indentaux\l@figure}
\def\get@l@figure@indentaux#1#2#3#4{\lfigureindent=#3\relax}
\AtBeginDocument{\get@l@figure@indent}
\makeatother

However, this can fail if some package (or class) changes the definition of \l@figure. Unfortunately there is no parameter for that length.

Answer 2

One quick fix would be to use a list to wrap the acronym environment and use the desired indention; this can be easily done with the help of the changepage package:

\documentclass{scrbook}
\usepackage[demo]{graphicx}
\usepackage{booktabs}
\usepackage{imakeidx}
\usepackage{changepage}
\makeindex

\usepackage{acronym}

\begin{document}

\chapter*{List of abbreviations}
\begin{adjustwidth}{1.5em}{}
\begin{acronym}
\acro{3PL}{Third-party logistics}
\acro{APS}{Advanced Planning and Scheduling}
\end{acronym}
\end{adjustwidth}

\listoffigures

\chapter{First chapter}

\section{Section}

    \begin{figure}[htbp]
       \centering
       \includegraphics{example.png} 
       \caption{example caption}
       \label{fig:example1}
    \end{figure}
    \index{Figure!Example1}

\end{document}