My MWE:
\documentclass[a4paper,12pt]{article}
\usepackage{showframe}
\usepackage{lipsum}
\usepackage{geometry}
\geometry{paper=a4paper}
\geometry{bindingoffset=1.5cm,hmargin={1.5cm,1.5cm},vmargin={1cm,1cm}}
\geometry{includehead=true,headheight=3cm,headsep=1cm}
\geometry{includefoot=false}
\begin{document}
\section{Section}
\lipsum[1-1]
\subsection{Subsection}
\lipsum[1-1]
\subsubsection{Subsubsection}
\lipsum[1-1]
\end{document}
text output: (bindingoffset 1.5cm + left margin 1.5cm; 3cm total left margin)
Is possible to make section and text under sections/subsections etc indented by 2 cm?
edit
With @Bernard help:
Is possible to move numbering left; like in my desired output?
EDIT 2 (also related to question Combining two macros) Using @Bernard, @ereg and @Henri Menke code and @cfr advice.
CODE
\documentclass[a4paper,12pt]{article}
\usepackage{lipsum}
\usepackage[showframe]{geometry}
\geometry{paper=a4paper}
\geometry{bindingoffset=1.5cm,hmargin={3.5cm,1.5cm},vmargin={1cm,1cm}}
\geometry{includehead=true,headheight=3cm,headsep=1cm}
\geometry{includefoot=false}
\usepackage{changepage}
\usepackage{titlesec}
\usepackage{etoolbox}
\usepackage[ampersand]{easylist}
\usepackage{xcolor}
\renewcommand{\contentsname}{\hfill \textit{Table of Contents}} %%Table of contents name change
\renewcommand{\listfigurename}{\hfill \textit{List of Figures}} %%List of figures name change
\renewcommand{\listtablename}{\hfill \textit{List of Tables}} %%List of tables name change
\newcommand\tocloflot{%
\clearpage
\tableofcontents
\addtocontents{toc}{\hrule height1pt}
\clearpage
\csname phantomsection\endcsname
\listoffigures
\addtocontents{lof}{\hrule height1pt\par\bigskip}
\addcontentsline{toc}{section}{List of Figures}
\clearpage
\csname phantomsection\endcsname
\listoftables
\addtocontents{lot}{\hrule height1pt\par\bigskip}
\addcontentsline{toc}{section}{List of Tables}
\clearpage
}
\titleformat{\section}{\Large\bfseries}{\parbox{2cm}{\thesection}}{-0.5pt}{}
\titleformat{\subsection}{\large\bfseries}{\parbox{2cm}{\thesubsection}}{-0.5pt}{}
\titleformat{\subsubsection}{\normalsize\bfseries}{\parbox{2cm}{\thesubsubsection}}{-0.5pt}{}
\titlespacing*{\section}{-2cm}{0.6cm}{0.6cm}
\titlespacing*{\subsection}{-2cm}{0.4cm}{0.4cm}
\titlespacing*{\subsubsection}{-2cm}{0.2cm}{0.2cm}
\def\defineEasylist#1#2{\expandafter\def\csname
Easylist@style@#1\endcsname{\NewList(#2)}}
\def\Easylist{\futurelet\next\doEasylist}
\def\doEasylist{\ifx[\next\expandafter\doEasylistone\else\expandafter
\doEasylistnop\fi}
\def\doEasylistone[#1]
{\begin{easylist}\if\relax\detokenize{#1}\relax\else\csname
Easylist@style@#1\endcsname\fi}
\def\doEasylistnop{\begin{easylist}\NewList}
\def\endEasylist{\end{easylist}}
\defineEasylist{lowercasestyle}
{Numbers=l,Hang=true,FinalSpace=0.2cm,Align=fixed,
Margin1=0.5cm,Margin2=1.5cm,Margin3=2.5cm,Margin4=3.5cm,
Margin5=4.5cm,Margin6=5.5cm,Margin7=6.5cm,Space=0.15cm,Space*=0.15cm}
\defineEasylist{uppercasestyle}
{Numbers=L,Hang=true,FinalSpace=0.2cm,Align=fixed,
Margin1=0.5cm,Margin2=1.5cm,Margin3=2.5cm,Margin4=3.5cm,
Margin5=4.5cm,Margin6=5.5cm,Margin7=6.5cm,Space=0.15cm,Space*=0.15cm}
\defineEasylist{romanlowercasestyle}
{Numbers=r,Hang=true,FinalSpace=0.2cm,Align=fixed,
Margin1=0.5cm,Margin2=1.5cm,Margin3=2.5cm,Margin4=3.5cm,
Margin5=4.5cm,Margin6=5.5cm,Margin7=6.5cm,Space=0.15cm,Space*=0.15cm}
\defineEasylist{romanuppercasestyle}
{Numbers=R,Hang=true,FinalSpace=0.2cm,Align=fixed,
Margin1=0.5cm,Margin2=1.5cm,Margin3=2.5cm,Margin4=3.5cm,
Margin5=4.5cm,Margin6=5.5cm,Margin7=6.5cm,Space=0.15cm,Space*=0.15cm}
\defineEasylist{bullet}{Hide=100,Hang=true,FinalSpace=0.5cm,Align=fixed,
Margin1=0.5cm,Margin2=1.5cm,Margin3=2.5cm,Margin4=3.5cm,
Margin5=4.5cm,Margin6=5.5cm,Margin7=6.5cm,Space=0.15cm,Space*=0.15cm,
Style1*=\textbullet\hspace{0.25cm},Style2*=$\circ$\hspace{0.25cm},
Style3*=$\star$\hspace{0.25cm},Style4*=$\mp$\hspace{0.25cm}}
\begin{document}
\tocloflot
\section{Section Section Section Section Section Section Section Section Section}
\lipsum[1]
\begin{Easylist}[bullet]
& dog
&& cat
&&& rabbit
\end{Easylist}
\par\bigskip
\begin{Easylist}[lowercasestyle]
& dog
&& cat
&&& rabbit
\end{Easylist}
\par\bigskip
\begin{Easylist}[romanuppercasestyle]
& dog
&& cat
&&& rabbit
\end{Easylist}
\par\bigskip
\begin{Easylist}[romanlowercasestyle]
& dog
&& cat
&&& rabbit
\end{Easylist}
\subsection{Section Section Section Section Section Section Section Section Section Section Section Section Section Section Section Section Section Section}
\lipsum[1]
\subsubsection{Section Section Section Section Section Section Section Section Section Section Section Section Section Section Section Section Section Section}
\lipsum[1]
\end{document}
\begin{adjustwidth{2cm}{} ... \end{adjustwidth}
, fromchangepage
? – Bernard Jul 17 '18 at 8:47\begin{adjustwidth{2cm}{} ... \end{adjustwidth}
; Is it possible to move numbering to the left, as shown at desired output? Thank you! – Beginner Jul 17 '18 at 9:16