[Tex/LaTex] Reduce margin around tcolorbox

horizontal alignmenttcolorbox

How to go about getting the text to have minimal spacing to the outline of a tcolorbox:

enter image description here

I would like to know how to adjust this spacing shown in red. Thank you!

CODE

\documentclass{article}
\usepackage[landscape]{geometry}
\usepackage[table]{xcolor}
\usepackage{mathtools}
\usepackage{multicol}
\usepackage{amssymb,amsthm}
\usepackage{tikz}
\usepackage[most]{tcolorbox}
\usepackage{lipsum}

\advance\topmargin-1in
\advance\textheight3in
\advance\textwidth3in
\advance\oddsidemargin-1.5in
\advance\evensidemargin-1.5in
\parindent0pt
\parskip2pt
\newcommand{\hr}{\centerline{\rule{3.5in}{1pt}}}

\begin{document}

\begin{multicols*}{3}

\newtcolorbox{mybox}[2][]{text width=0.97\textwidth,fontupper=\scriptsize,
fonttitle=\bfseries\sffamily\scriptsize, colbacktitle=black,enhanced,
attach boxed title to top left={yshift=-2mm,xshift=3mm},
boxed title style={sharp corners},top=3pt,bottom=2pt,
  title=#2,colback=white}

%%------------ AM: Double Sideband Large Carrier ---------------
\hspace*{0.07cm}
\begin{minipage}{0.30\textwidth}

    \begin{mybox}{AM: Double Sideband Large Carrier [DSB-LC\text{]}}
\lipsum[2]

    \end{mybox}
\end{minipage}

\end{multicols*}
\end{document}

Best Answer

One possibility is to adjust the left margin with the left=2pt parameter and the right margin with the right=2pt parameter.

What produces:

tcolorbox

\documentclass{article}
\usepackage[landscape]{geometry}
\usepackage[table]{xcolor}
\usepackage{mathtools}
\usepackage{multicol}
\usepackage{amssymb,amsthm}
\usepackage{tikz}
\usepackage[most]{tcolorbox}
\usepackage{lipsum}

\advance\topmargin-1in
\advance\textheight3in
\advance\textwidth3in
\advance\oddsidemargin-1.5in
\advance\evensidemargin-1.5in
\parindent0pt
\parskip2pt
\newcommand{\hr}{\centerline{\rule{3.5in}{1pt}}}

\begin{document}

\begin{multicols*}{3}

\newtcolorbox{mybox}[2][]{text width=0.97\textwidth,fontupper=\scriptsize,
fonttitle=\bfseries\sffamily\scriptsize, colbacktitle=black,enhanced,
attach boxed title to top left={yshift=-2mm,xshift=3mm},
boxed title style={sharp corners},top=3pt,bottom=2pt,left=2pt,right=2pt,
  title=#2,colback=white}

%%------------ AM: Double Sideband Large Carrier ---------------
\hspace*{0.07cm}
\begin{minipage}{0.30\textwidth}

    \begin{mybox}{AM: Double Sideband Large Carrier [DSB-LC\text{]}}
\lipsum[2]

    \end{mybox}
\end{minipage}

\end{multicols*}
\end{document}
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