如何修改 Beamer 主题？

Question

以下是使用法兰克福主题的 MWE：

\documentclass{beamer}
\usetheme{Frankfurt}
\setbeamertemplate{navigation symbols}{}

\usepackage{hyperref}
\usepackage{tikz}
\usepackage{sansmathaccent}
\pdfmapfile{+sansmathaccent.map}
\graphicspath{ {external/} }

\newcommand{\ExternalLink}{%
\tikz[x=1.2ex, y=1.2ex, baseline=-0.05ex]{% 
    \begin{scope}[x=1ex, y=1ex]
        \clip (-0.1,-0.1) 
        --++ (-0, 1.2) 
        --++ (0.6, 0) 
        --++ (0, -0.6) 
        --++ (0.6, 0) 
        --++ (0, -1);
        \path[draw, 
        line width = 0.5, 
        rounded corners=0.5] 
        (0,0) rectangle (1,1);
    \end{scope}
    \path[draw, line width = 0.5] (0.5, 0.5) 
    -- (1, 1);
    \path[draw, line width = 0.5] (0.6, 1) 
    -- (1, 1) -- (1, 0.6);
}
}


\hypersetup{
colorlinks = true,
allcolors=red
}


\def\blue#1{\text{\color{blue}{#1}}}
\def\red#1{\text{\color{red}{#1}}}
\def\gray#1{\color{gray!50}{#1}\color{black}}

\begin{document}



\section[Using Indifference Curves]{}

\begin{frame}{Deriving a Demand Curve: Step 5 of 5}

\begin{columns}[T]

    \begin{column}{0.55\linewidth}
        \textbf{STEPS:}
        \begin{enumerate}
            \item \gray{Let the price of $x$ be $p_0$. Plot an indifference curve and budget line. Mark the equilibrium at $x_0$.}
            \item \gray{Drag it down to the diagram below and plot $(x_0,p_0)$.}
            \item \gray{Say the price of $x$ falls to $p_1$. Pivot the budget line. Shift the indifference curve outwards and mark the new equilibrium at $x_1$.}
            \item \gray{Repeat step (2) and plot $(x_1,p_1)$.}
            \item Join the two points. Voila!
        \end{enumerate}
    \end{column}

    \begin{column}{0.45\linewidth}
        \begin{center} \begin{tikzpicture}[scale=0.7]
            \footnotesize
            \draw[->] (0,0) -- (4.2,0) node[right] {$x$};
            \draw[->] (0,0) -- (0,4) node[above] {$y$};
            \draw (0,0) plot [domain=0.4:3.8] (\x,1.4/\x);
            \draw [red] (0,0) plot [domain=0.7:3.8] (\x,2.8/\x);
            \draw (0,0) plot [domain=0:2] (\x,-\x*1.4 + 2.8);
            \draw [red] (0,0) plot [domain=0:4] (\x,-\x*0.7 + 2.8);

            \draw[red,fill] (2.1,1.35) circle [ radius =0.05];  
            \draw[fill] (1,1.45) circle [ radius =0.05];        

            \draw [dashed,red] (2.1,-4.5) node[below]{$x_1$} -- (2.1,1.35);
            \draw [dashed] (1,-4.5)node[below]{$x_0$} -- (1,1.45);

            %second set of axes

            \draw[->] (0,-4.5) -- (4.2,-4.5) node[right] {$x$};
            \draw[->] (0,-4.5) -- (0,-0.8) node[above] {$p_x$};

            \draw[red,fill] (2.1,-3.5) circle [ radius =0.05];  
            \draw[fill] (1,-2) circle [ radius =0.05];

            \draw[red,dashed] (2.1,-3.5) -- (0,-3.5) node[left]{$p_1$};
            \draw[dashed] (1,-2) -- (0,-2) node[left]{$p_0$};

            \draw[thick] (0.5,-1.3) -- (2.6,-4.2) node[right] {D$_x$};
            \draw[->] (-0.3,-2.3) -- (-0.3,-3.2);
            \draw[<-] (1.8,-4.7) -- (1.3,-4.7);


            \end{tikzpicture} 
    \end{center}

    \end{column}



\end{columns}

\end{frame}

% NewFrame

\end{document}

这是输出的图片：

我想修改两件事：

（1）在顶部的导航面板中，将文本“使用无差异曲线”更改为绿色，而不是红色。

（2）将框架标题行的背景颜色从蓝色（带白色文本）更改为黑色（带白色文本）。

我怎样才能实现这些？

Answer 1

标题部分的颜色可以通过 来控制\setbeamercolor{section in head/foot}{fg=green}，但是这仅在您不通过设置禁用 beamers 颜色机制时才有效colorlinks = true。

框架标题背景可以用 来设置\setbeamercolor{frametitle}{bg=black}。

补充说明：

• 你不需要hyperref用 beamer加载

• 请检查是否确实需要\usepackage{sansmathaccent} \pdfmapfile{+sansmathaccent.map}。无论如何，它的许多定义都会被忽略。

---

\documentclass{beamer}
\usetheme{Frankfurt}
\setbeamertemplate{navigation symbols}{}
\setbeamercolor{section in head/foot}{fg=green}
\setbeamercolor{frametitle}{bg=black}

\begin{document}

\section{Using Indifference Curves}

\begin{frame}{Deriving a Demand Curve: Step 5 of 5}
text
\end{frame}

\end{document}