[Tex/LaTex] Beamer change frame height

beamertemplates

I wrote a custom beamer style. The frame titles height is larger than the standard one. Due to this the frame moves downward over the foot-line and the lower border.

How can I correct the frame height to stay between frame-title and foot-line using \defbeamertemplate or similar?

An example presentation

\documentclass[10pt,aspectratio=169]{beamer}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[ngerman]{babel}

\usetheme{mwe}

\author{an Author}
\title{a Title}
\subtitle{a subtitle}
\date{\today}

%%% DOCUMENT %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}

\begin{frame}{title}
\begin{tikzpicture}
\draw [very thick] (0,0)rectangle(\textwidth,\textheight);
\end{tikzpicture}
\end{frame}

\end{document}

beamerthememwe.sty

\mode<presentation>

\RequirePackage{tikz}
\usetikzlibrary{calc}
\usetikzlibrary{positioning}

% Settings
\useoutertheme{mwe}

\mode<all>

beamerouterthememwe.sty

\mode<presentation>

% Frame title
\defbeamertemplate*{frametitle}{mwe}[1][]
{
    \begin{tikzpicture}
        \useasboundingbox[]
            (0,0)rectangle(\textwidth+0.5\paperwidth-0.5\textwidth,.135\paperheight);
        \node [ anchor=east,
        font=\LARGE,
        black,
        minimum height=10pt,
        align=center]
            at (current bounding box.east)
            {\textbf{\insertframetitle}};
    \end{tikzpicture}
    \vspace*{5pt}
}


\defbeamertemplate*{footline}{mwe}[1][]
{
    \begin{tikzpicture}
        \useasboundingbox [draw] (0,\the\textheight) -- (\the\paperwidth,\the\textheight);

        \node [anchor=south west, font=\tiny, black]
            at ($(current bounding box.west)+(5pt,0)$)
            {\insertauthor};

        \node [anchor=south, font=\tiny, black]
            at (current bounding box)
            {\insertdate};

        \node [anchor=south east, font=\tiny, black]
            at ($(current bounding box.east)+(-5pt,0)$)
            {\insertframenumber/\inserttotalframenumber};

        \draw [double distance = 0.6pt, line cap=round,color=black]
            ($(current bounding box.west)+(5pt,11pt)$) --
            ($(current bounding box.east)+(-5pt,11pt)$);

    \end{tikzpicture}
}
\mode<all>

This is the output: The big frame shows the dimension of the frame-area.

enter image description here

\newcommand*{\BlockImage}[3]
{
   \begin{column}{#1\textwidth}
   \begin{block}{\footnotesize #2}
      \centering
      \includegraphics[width=\textwidth,
                       height=.75\beamer@frametextheight,
                       keepaspectratio]{#3}
   \end{block}
   \end{column}
}

final workaround

\makeatletter
\newlength{\frameheadheight}
\setlength{\frameheadheight}{2cm}
\newlength{\frametextheight}
\setlength{\frametextheight}{\paperheight}
\addtolength{\frametextheight}{-\footheight}
\addtolength{\frametextheight}{-\headheight}
\addtolength{\frametextheight}{-\frameheadheight}
\makeatother

\newcommand*{\BlockImg}[3]
{
   \begin{column}{#1\textwidth}
   \vskip-.5\frameheadheight
   \begin{block}{\footnotesize #2}
      \centering
      \includegraphics[%width=\textwidth,
                       height=.75\frametextheight,
                       keepaspectratio]{#3}
   \end{block}
   \end{column}
}

Best Answer

The problem that your itemize did not shrink above the footline is totally unrelated to the frametitle or the textheight. The problem is that your footline has zero height. If you increase the height of the footline, the items will shrink above it:

\documentclass[10pt,aspectratio=169]{beamer}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[ngerman]{babel}

\RequirePackage{tikz}
\usetikzlibrary{calc}
\usetikzlibrary{positioning}

\mode<presentation>

% Frame title
\defbeamertemplate*{frametitle}{mwe}[1][]
{
    \begin{tikzpicture}
        \useasboundingbox[]
            (0,0)rectangle(\textwidth+0.5\paperwidth-0.5\textwidth,.135\paperheight);
        \node [ anchor=east,
        font=\LARGE,
        black,
        minimum height=10pt,
        align=center]
            at (current bounding box.east)
            {\textbf{\insertframetitle}};
    \end{tikzpicture}
    \vspace*{5pt}
}


\defbeamertemplate*{footline}{mwe}[1][]
{
        \vskip1.8\baselineskip
    \begin{tikzpicture}
        \useasboundingbox [draw] (0,\the\textheight) -- (\the\paperwidth,\the\textheight);

        \node [anchor=south west, font=\tiny, black]
            at ($(current bounding box.west)+(5pt,0)$)
            {\insertauthor};

        \node [anchor=south, font=\tiny, black]
            at (current bounding box)
            {\insertdate};

        \node [anchor=south east, font=\tiny, black]
            at ($(current bounding box.east)+(-5pt,0)$)
            {\insertframenumber/\inserttotalframenumber};

        \draw [double distance = 0.6pt, line cap=round,color=black]
            ($(current bounding box.west)+(5pt,11pt)$) --
            ($(current bounding box.east)+(-5pt,11pt)$);

    \end{tikzpicture}
}
\mode<all>

\author{an Author}
\title{a Title}
\subtitle{a subtitle}
\date{\today}

%%% DOCUMENT %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}

\begin{frame}{title}
\begin{itemize}
\item t
\item t
\item t
\item t
\item t
\item t
\item t
\item t
\item t
\item t
\end{itemize}
\end{frame}

\begin{frame}{title}
\begin{itemize}
\item t
\item t
\item t
\item t
\item t
\item t
\item t
\item t
\item t
\item t
\item t
\item t
\item t
\item t
\end{itemize}
\end{frame}

\end{document}

For creating some height to scale images:

\documentclass[10pt,aspectratio=169]{beamer}

\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}
\usepackage[ngerman]{babel}

\RequirePackage{tikz}
\usetikzlibrary{calc}
\usetikzlibrary{positioning}

\mode<presentation>

% Frame title
\defbeamertemplate*{frametitle}{mwe}[1][]
{
    \begin{tikzpicture}
        \useasboundingbox[]
            (0,0)rectangle(\textwidth+0.5\paperwidth-0.5\textwidth,.135\paperheight);
        \node [ anchor=east,
        font=\LARGE,
        black,
        minimum height=10pt,
        align=center]
            at (current bounding box.east)
            {\textbf{\insertframetitle}};
    \end{tikzpicture}
    \vspace*{5pt}
}


\defbeamertemplate*{footline}{mwe}[1][]
{
        \vskip1.8\baselineskip
    \begin{tikzpicture}
        \useasboundingbox [draw] (0,\the\textheight) -- (\the\paperwidth,\the\textheight);

        \node [anchor=south west, font=\tiny, black]
            at ($(current bounding box.west)+(5pt,0)$)
            {\insertauthor};

        \node [anchor=south, font=\tiny, black]
            at (current bounding box)
            {\insertdate};

        \node [anchor=south east, font=\tiny, black]
            at ($(current bounding box.east)+(-5pt,0)$)
            {\insertframenumber/\inserttotalframenumber};

        \draw [double distance = 0.6pt, line cap=round,color=black]
            ($(current bounding box.west)+(5pt,11pt)$) --
            ($(current bounding box.east)+(-5pt,11pt)$);

    \end{tikzpicture}
}
\mode<all>

\makeatletter
\newlength{\myheight}
\setlength{\myheight}{\paperheight}
\addtolength{\myheight}{-\footheight}
\addtolength{\myheight}{-\headheight}
\addtolength{\myheight}{-1.95cm}
\makeatother

\author{an Author}
\title{a Title}
\subtitle{a subtitle}
\date{\today}

%%% DOCUMENT %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

\begin{document}

\begin{frame}{title}
\begin{tikzpicture}
\draw [very thick] (0,0)rectangle(\textwidth,\myheight);
\end{tikzpicture}

\end{frame}

\end{document}
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