[Tex/LaTex] Controlling Enumerate Nesting Level

Question

How can I control what nesting level enumerate starts at?

I often want to have the first level of my list use (a),(b),(c),… the second level use i.,ii.,iii., … Currently I manually set the label for each enumerate using the enumitem package.

I do not want to redefine the counters enumi, enumii, etc., because sometimes I want the top level to use arabic numerals.

Is it possible to tell LaTeX to start with the enumii counters for the top level, and then have it use enumiii counters at the next level automatically?

What I currently do:

\documentclass{article}
\usepackage{enumitem}
\begin{document}
\begin{enumerate}[label=(\alph*)]
\item
\begin{enumerate}[label=\roman*.]
\item
\item
\begin{enumerate}[label=(\Alph*)]
\item
\item
\end{enumerate}
\item
\end{enumerate}
\item
\item
\end{enumerate}
\end{document}

Answer 1

Define a new list setting the labels as you wish:

\documentclass{article}

\usepackage{enumitem}

\newlist{mrcenum}{enumerate}{3}
\setlist[mrcenum,1]{label=(\alph*)}
\setlist[mrcenum,2]{label=(\roman*)}
\setlist[mrcenum,3]{label=(\Alph*)}

\begin{document}
\begin{mrcenum}
\item
\begin{mrcenum}
\item
\item
\begin{mrcenum}
\item
\item
\end{mrcenum}
\item
\end{mrcenum}
\item
\item
\end{mrcenum}
\end{document}

You can also do

\setlist[enumerate,1]{\label=(\alph*)}

and so on, then using enumerate.