Mrthfx

I am trying to set-up an application note style, and this is what I have come up so far:

documentclass[a4paper,twocolumn,twoside,11pt]{article}

usepackage[utf8]{inputenc}

usepackage[]{Chivo}

usepackage{verbatim}

usepackage{xcolor}

usepackage{tabularx}

usepackage{pgf, tikz}

usepackage{mathrsfs}

usepackage{verbatim}

usepackage{lastpage}



usetikzlibrary{shapes, calc, shapes, arrows, babel}



usepackage{amsmath, amssymb, textcomp}

everymath{displaystyle}





usepackage{eurosym}



usepackage{graphicx}

graphicspath{{./img/}}

usepackage{svg}

usepackage{lipsum}



usepackage{hyperref}



% custom header/footer

usepackage{fancyhdr}

%pagestyle{fancy}

makeatletter

newcommand{logo}{includegraphics[width=0.6columnwidth]{logo.png}}

newcommand{logosmall}{includegraphics[width=0.3columnwidth]{logo.png}}

newcommand{claim}{©YYYY Company name, Inc. All rights reserved.\ Trademarks and registered trademarks are the\vspace{-6pt} property of their respective owners.}

newcommand{website}{www.companysite.com}

renewcommand{date}[1]{gdef@date{#1}}

newcommand*{revision}[1]{gdef@revision{#1}}

newcommand*{code}[1]{gdef@code{#1}}

newcommand*{type}[1]{gdef@type{#1}}

%

%

% First page

%

fancypagestyle{first}{

    renewcommand{familydefault}{sfdefault}

    setlengthheadheight{47pt}

    %renewcommand{topmargin}{0pt}

    fancyhead[L]{logo}

    fancyhead[R]{%

    huge{bf{%

    @code\

    @type

    }}}%

    renewcommand{headrulewidth}{2pt}

    headrule

    %

    fancyfoot[L]{@date}

    fancyfoot[C]{@revision}

    fancyfoot[R]{Page~thepage~of~pageref{LastPage}}

}

%

% Document body

fancypagestyle{body}{

    renewcommand{familydefault}{sfdefault}

    setlengthheadheight{47pt}

    %renewcommand{topmargin}{0pt}

    % even pages

    fancyhead[CE]{fbox{%

    parbox{textwidth}{

    vspace*{10pt}huge{

    textbf{@code}

    hfill

    textbf{color{lightgray}{@type}}

    }

    vspace*{10pt}

    }}}%

    % odd pages

    fancyhead[CO]{fbox{%

    parbox{textwidth}{

    vspace*{10pt}huge{

    textbf{color{lightgray}{@type}}

    hfill textbf{@code}

    }

    vspace*{10pt}

    }}}%

    renewcommand{headrulewidth}{0pt}

    %

    fancyfoot[L]{@date}

    fancyfoot[C]{@revision}

    fancyfoot[R]{Page~thepage~of~pageref{LastPage}}

}

%

%

% Last page

fancypagestyle{last}{

    renewcommand{familydefault}{sfdefault}

    setlengthheadheight{47pt}

    %renewcommand{topmargin}{0pt}

    % even pages

    fancyhead[CE]{fbox{%

    parbox{textwidth}{

    vspace*{10pt}huge{

    textbf{@code}

    hfill

    textbf{color{lightgray}{@type}}

    }

    vspace*{10pt}

    }}}%

    % odd pages

    fancyhead[CO]{fbox{%

    parbox{textwidth}{

    vspace*{10pt}huge{

    textbf{color{lightgray}{@type}}

    hfill textbf{@code}

    }

    vspace*{10pt}

    }}}%

    renewcommand{headrulewidth}{0pt}

    %

    fancyfoot[L]{vspace*{-10pt}{tiny claim}\ @date}

    fancyfoot[C]{vspace{-20pt}logosmall\ @revision}

    fancyfoot[R]{fbox{%

    parbox{0.3textwidth}{

    large{

    vspace*{10pt}

    textbf{website}

    vspace*{-5pt}

    }}}\

    Page~thepage~of~pageref{LastPage}

    }

}

makeatother



% custom title

makeatletter

renewcommand*{maketitle}{%

renewcommand{familydefault}{sfdefault}

thispagestyle{first}

twocolumn[

letclearpagerelax% Remove clearpage functionality

vspace*{-10pt}% Insert needed vertical retraction

begin{@twocolumnfalse}

    begin{center}

    bf{

        {LARGE@titlepar}

        @author

        }

    end{center}

    end{@twocolumnfalse}

    vspace*{30pt}

    ]

}%

makeatother



setcounter{secnumdepth}{0} % sections are level 1



title{My Outstanding Application Note Title}

author{J.~Doe}

date{22.02.2019}

revision{Rev.~0.1}

code{AN-1}

type{APPLICATION~NOTE}



begin{document}

maketitle

tableofcontents

clearpage

pagestyle{body}



section{Section}

lipsum[1]



section{Section}

lipsum[2]



subsection{Subsection}

lipsum[3]



section{Section}

lipsum[4]



subsection{Subsection}

lipsum[5]



paragraph{Paragraph}

lipsum[6]



subsection{Subsection}

lipsum[7]



paragraph{Paragraph}

lipsum[8]



newpage

clearpage

pagestyle{last}

begin{onecolumn}

begin{table}[!ht]%

caption{Revision history.}

label{}

centering

begin{tabular}{p{0.3linewidth}p{0.3linewidth}p{0.3linewidth}}

hline

Revision & Author & Changes\

hline

cell 1 & cell 2 & cell 3\

cell 1 & cell 2 & cell 3\

hline

end{tabular}

end{table}

end{onecolumn}



end{document}

This mostly replicates Analog Devices application notes that I like very much (hoping I am not infringing any copyright though).

However, this is not still what I want to achieve since I can't get the index on the second page (even though it is still fine to have it on the first which is something that I like the same), I can't get company info just above the rule in the first page and footers on the last page are not properly aligned. Last, I am not a very good latex programmer so I think everything could be better arranged (maybe in a class/style).

I want to share my code and ask somebody to improve it, if possible.

Thank you.