head_maintext.sty

\usepackage{setspace}
\doublespacing
%\usepackage{siunitx}
%\twocolumn

%\usepackage{indentfirst}
\usepackage{lettrine}
\usepackage{hyperref}
%\usepackage[switch]{lineno} % for two column option
\usepackage{lineno}
\linenumbers

\hypersetup{linkcolor=red}

\usepackage{caption}
\captionsetup[figure]{width=16cm}
\captionsetup[figure]{font={stretch=1.5}} 
\captionsetup[table]{width=16cm}
\captionsetup[table]{font={stretch=1.5}} 

\usepackage[nomarkers,nolists]{endfloat} % to push figure and table at the end

\usepackage{tcolorbox} %for significance highlighter

\newcommand{\mean}{\operatorname{mean}}
\newcommand{\cov}{\operatorname{cov}}
\newcommand{\var}{\operatorname{var}}
\newcommand{\sd}{\operatorname{sd}}
\newcommand{\sk}{\operatorname{sk}}
\newcommand{\Scom}{S_{\text{com}}}
\newcommand{\Snta}{S_{\text{nta}}}
\newcommand{\Sind}{S_{\text{ind}}}
\newcommand{\Ssyn}{S_{\text{syn}}}
\newcommand{\cor}{\operatorname{cor}}
\newcommand{\Ps}{\operatorname{P}}  
\newcommand{\Dsq}{\operatorname{D}^2}
\newcommand{\rank}{\operatorname{rank}}
\newcommand{\CVcomsq}{V_{\text{com}}} %{\text{CV}_{\text{com}}^2}
\newcommand{\CVntasq}{V_{\text{nta}}} %{\text{CV}_{\text{nta}}^2}
\newcommand{\CVindsq}{V_{\text{ind}}} %{\text{CV}_{\text{ind}}^2}
\newcommand{\CVsynsq}{V_{\text{syn}}} %{\text{CV}_{\text{syn}}^2}
\newcommand{\xtot}{x_{\text{tot}}}
\newcommand{\Atot}{A_{\text{tot}}}
\newcommand{\phicv}{\phi_{V}}
\newcommand{\phiLdM}{\phi_{V,\text{LdM}}}
\newcommand{\phicvcor}{\phi_{V,\text{cor}}}
\newcommand{\phicvta}{\phi_{V,\text{ta}}}
\newcommand{\phiS}{\phi_{S}}
\newcommand{\phiSLdM}{\phi_{S,\text{LdM}}}
\newcommand{\phiScor}{\phi_{S,\text{cor}}}
\newcommand{\phiSta}{\phi_{S,\text{ta}}}