cheat_sheet.tex

\documentclass[letterpaper,10pt]{extarticle}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage{graphicx}
\usepackage[x11names]{xcolor}
\usepackage{tikz}
\usetikzlibrary{circuits.ee.IEC}
\usepackage[os=win]{menukeys}

\usepackage{amsmath,amssymb,textcomp}
\everymath{\displaystyle}

\usepackage{physics}

\usepackage{times}
\renewcommand\familydefault{\sfdefault}
\usepackage{tgheros}
\usepackage{droidmono}

\usepackage{enumitem}
\usepackage[explicit]{titlesec}

\usepackage{multicol}
\setlength{\columnseprule}{0pt}
\setlength{\columnsep}{15.0pt}

\usepackage{geometry}
\geometry{left=10mm,right=10mm,top=10mm,bottom=15mm,showframe=false}

% custom title
\makeatletter
\renewcommand*{\maketitle}{%
\noindent
\begin{minipage}{0.82\textwidth}
\begin{tikzpicture}
\node[rectangle,rounded corners=6pt,inner sep=6pt,fill=SteelBlue1,text width=.95\textwidth] {\color{black}\huge \@title};
\end{tikzpicture}
\end{minipage}
\hfill
\begin{minipage}{0.17\textwidth}
\begin{tikzpicture}
\node[rectangle,rounded corners=3pt,inner sep=10pt,draw=SteelBlue1,text width= 0.78\textwidth] {\raggedleft \Large \@author\ \@date};
\end{tikzpicture}
\end{minipage}
%\bigskip%\bigskip
}%
\makeatother

% custom section
\newcommand*\sectionlabel{}
\titleformat{\section}
  {\gdef\sectionlabel{}
   \normalfont\sffamily\Large\bfseries\scshape}
  {\gdef\sectionlabel{\thesection\ }}{0pt}
  {
\noindent
\begin{tikzpicture}
\node[rectangle,rounded corners=3pt,inner sep=4pt,fill=DodgerBlue4,text width= 0.95\columnwidth] {\color{white}\sectionlabel#1};
\end{tikzpicture}
  }
\titlespacing*{\section}{0pt}{.5pt}{0.5pt}

% custom subsection
\newcommand*\subsectionlabel{}
\titleformat{\subsection}{\normalfont\sffamily\bfseries\scshape}{\subsectionlabel}{0pt}{
\noindent
\begin{tikzpicture}
\node[rectangle,rounded corners=4pt,inner sep=3pt,fill=DodgerBlue3,text width= 0.95\columnwidth] {\color{white}\subsectionlabel#1};
\end{tikzpicture}
}
\titlespacing*{\subsection}{0pt}{.5pt}{.5pt}

% custom subsubsection
\newcommand*\subsubsectionlabel{}
\titleformat{\subsubsection}{\normalfont\sffamily\small\bfseries\scshape}{\subsubsectionlabel}{0pt}{
\noindent
\begin{tikzpicture}
\node[rectangle,rounded corners=3pt,inner sep=3pt,fill=blue!50!yellow,text width= 0.95\columnwidth] {\color{white}\subsubsectionlabel#1};
\end{tikzpicture}
}
\titlespacing*{\subsubsection}{0pt}{.5pt}{.5pt}


\title{GPA220 : Analyse des circuits électriques}
\author{INTRA}
\date{A2018}

%\linespread{1.3}

\begin{document}
\maketitle

\begin{multicols*}{2}

\setlength{\belowdisplayskip}{2.5pt}
\setlength{\belowdisplayshortskip}{2.5pt}
\setlength{\abovedisplayskip}{2.5pt}
\setlength{\abovedisplayshortskip}{2.5pt}
\input{content}

\end{multicols*}

\end{document}