This can be accomplished for multiple lists by setting the style for each level of the enumerate environment using:
\setlist[enumerate,<level>]{<format>}
By also setting the before formatter, you can set the text of the entire item in a certain font, as you seemed to desire from your question. Resetting for level two will set the fonts for the label and item back to normal for future levels.
An example:
\documentclass[]{article}
\usepackage{enumitem}
\begin{document}
% Change format of top-level list items
\setlist[enumerate,1]{label*=\arabic*,font=\bfseries,before=\bfseries}
% Reset formatting for subsequent levels; label type makes 1.1, legal-style labels
\setlist[enumerate,2]{label*=.\arabic*,font=\normalfont,before=\normalfont}
\begin{enumerate}
\item One
\item Two
\begin{enumerate}
\item Three
\item Four
\end{enumerate}
\item Five
\end{enumerate}
\end{document}
\documentclass[a4paper,twoside,openright,11pt]{scrbook}
\usepackage[left=1.5cm,right=1cm,top=3cm,bottom=1.5cm,marginparwidth=6cm,marginparsep=1cm,outer=8cm]{geometry}
\usepackage[T1]{fontenc}
\usepackage{color}
\usepackage{bm}
\usepackage{enumitem}
\newcommand{\ssitem}[1][black]{\stepcounter{enumii}\item[\color{#1}$\bm{*}$\,\textbf{\alph{enumii})}]}
\newcommand{\sitem}[1][black]{\stepcounter{enumi}\item[\color{#1}$\bm{*}$\,\textbf{\theenumi}]}
%\renewcommand\theenumi{\textbf{\arabic{enumi}.}}
%\renewcommand\theenumii{\textbf{\alph{enumii}}}
\setlist[enumerate,1]{label=\textbf{\arabic*.}}
\setlist[enumerate,2]{label=\textbf{\alph*)}}
\begin{document}
\begin{enumerate}
\item Black Question
\begin{enumerate}
\item Case \textbf{*}
\item Case
\ssitem No problem in black color
\end{enumerate}
\end{enumerate}
\textbf{Lorem}
\begin{enumerate}[resume]
\sitem[blue] Blue Question
\begin{enumerate}
\ssitem[red] Case
\ssitem[blue] Problem, no added asterisk
\item Case
\end{enumerate}
\end{enumerate}
\end{document}
Best Answer
If you want the whole item bold, you can write:
If you want the number to be bold, you can do it by using the
enumitem
package and setting:Check the
enumitem
package documentation for more info.