Itemize – How to Redefine the Itemize Environment in LaTeX

Question

How to redefine itemize? So every time I use itemize without any options LaTeX uses the code below.

\begin{itemize}[label={\large $\bullet$}, labelsep=3mm]
      \item 
\end{itemize}

Answer 1

I assume, that for list you use enumitem package. If this is true, than in package documentation is described how you can globally set list options (see section 5 Global settings, page 15):

\documentclass{article}
\usepackage{enumitem}
\setlist[itemize]{label={\large $\bullet$}, labelsep=3mm}
\usepackage{lipsum}

\begin{document}
\begin{itemize}
      \item \lipsum[66]
\end{itemize}
\end{document}