beamerinnerthemeABR.sty

\mode<presentation>

% make background for title frame, and set other frames to blank
\setbeamertemplate{background}{
    \begin{tikzpicture}
        \useasboundingbox (0, 0) rectangle(\the\paperwidth, \the\paperheight);
        \node[anchor=center, xshift=-2cm] at (0.5\paperwidth,0.5\paperheight)
            {\includegraphics[height=\paperheight, width=1.8\paperwidth]
            {title_slide.jpg}};
        \ifnum\thepage>1\relax%
            \fill[myWhite,opacity=1] (0,0) rectangle(\the\paperwidth,\the\paperheight);
        \fi
    \end{tikzpicture}

}

% make title frame
\defbeamertemplate*{title page}{ABR}[1][]
{
    \vskip0.5cm%
    \begin{beamercolorbox}[wd=0.9\paperwidth,#1]{}
        \href{https://appliedbrainresearch.com/}
        {\includegraphics[height=1.5cm]{ABR_logo.png}}%
    \end{beamercolorbox}%
    \vskip5.5cm%
    \begin{beamercolorbox}[wd=0.9\paperwidth,right,#1]
        {title}\usebeamerfont{title}\inserttitle\par%
    \end{beamercolorbox}%
    \vskip5pt%
    \begin{beamercolorbox}[wd=0.9\paperwidth,right,#1]
        {subtitle}\usebeamerfont{subtitle}\insertsubtitle\par%
    \end{beamercolorbox}%

}

% Bullet shapes
\setbeamertemplate{itemize item}[triangle]
\setbeamertemplate{itemize subitem}{
    \begin{tikzpicture}%
        \draw (0,0.7ex) -- (0,0) -- (0.75em,0);
        \draw (0.55em,0.2em) -- (0.75em,0) -- (0.55em,-0.2em);
      \end{tikzpicture}%

}
\setbeamertemplate{enumerate subitem}{\alph{enumii}.}

% Remove caption prefixes
\setbeamertemplate{caption}{\raggedright\insertcaption\par}

%automatically generate section frame
\AtBeginSection{\frame{\sectionpage}}
\defbeamertemplate*{section page}{ABR}[1][]
{
    \begin{tikzpicture}
        \useasboundingbox (0, 0) rectangle(\the\paperwidth, \the\paperheight);
        \node[anchor=center, xshift=-0.5cm, yshift=-0.3cm, opacity=0.65] at
            (0.5\paperwidth,0.5\paperheight)
            {\includegraphics[height=\the\paperheight, width=0.75\paperwidth]
            {section_slide.png}};%
        \node[anchor=center, font=\usebeamerfont{sectiontitle}, myDBlue] at
            (0.5\linewidth,0.5\paperheight)
            {\let\hyperlink\@secondoftwo\centering\insertsection};
    \end{tikzpicture}

}