你好，我正在使用 Sharelatex 在线使用 latex，它附带了几个模板来创建演示文稿，我决定使用一个名为：Radboud University Beamer 的模板，下面我放了主要两个部分的完整代码，example.tex 和 ru.sty。
我想改变字体的颜色，因此分析代码时我在 ru.sty 中发现了以下部分，
\AtBeginDocument{
\pgfdeclareverticalshading{beamer@topshade}{\paperwidth}{%
color(0pt)=(bg);
color(4pt)=(black!50!bg)}
我相信这是在定义字体的颜色，但是这对我来说有点高级，我无法改变字体的颜色，我想知道如何改变它，我想知道是否有可能或者字母的颜色是否属于主题，
第二个问题与 ru.sty 中以下部分定义的背景有关：
% Background
\pgfdeclareimage[width=\paperwidth,height=\paperheight]{bg}{ru_background}
\setbeamertemplate{background}{\pgfuseimage{bg}}
在此部分，您可以选择一张图片，问题是，如果我选择某张图片，则所有页面都会具有相同的背景，我希望拥有独立的背景，非常感谢支持，欢迎提出所有建议以了解这个模板是如何工作的，下面我把构成模板的两个主要部分的完整代码放出来。
第一部分名为：example.tex
\documentclass{beamer}
\usepackage[british]{babel}
\usepackage{graphicx,hyperref,ru,url}
% The title of the presentation:
% - first a short version which is visible at the bottom of each slide;
% - second the full title shown on the title slide;
\title[RU style for Beamer]{
Radboud University style for Beamer \LaTeX}
% Optional: a subtitle to be dispalyed on the title slide
\subtitle{Show where you're from}
% The author(s) of the presentation:
% - again first a short version to be displayed at the bottom;
% - next the full list of authors, which may include contact information;
\author[Pim Vullers MSc]{
Pim Vullers MSc \\\medskip
{\small \url{[email protected]}} \\
{\small \url{http://www.cs.ru.nl/~pim/}}}
% The institute:
% - to start the name of the university as displayed on the top of each slide
% this can be adjusted such that you can also create a Dutch version
% - next the institute information as displayed on the title slide
\institute[Radboud University Nijmegen]{
Institute for Computing and Information Sciences -- Digital Security \\
Radboud University Nijmegen}
% Add a date and possibly the name of the event to the slides
% - again first a short version to be shown at the bottom of each slide
% - second the full date and event name for the title slide
\date[slides Example 2010]{
the 1st example presentation 2010 \\
7th October 2010}
\begin{document}
\begin{frame}
\titlepage
\end{frame}
\begin{frame}
\frametitle{Outline}
\tableofcontents
\end{frame}
% Section titles are shown in at the top of the slides with the current section
% highlighted. Note that the number of sections determines the size of the top
% bar, and hence the university name and logo. If you do not add any sections
% they will not be visible.
\section{Introduction}
\begin{frame}
\frametitle{Introduction}
\begin{itemize}
\item This is just a short example
\item The comments in the \LaTeX\ file are most important
\item This is just the result after running pdflatex
\item The style is based on the webpage \url{http://www.ru.nl/}
\end{itemize}
\end{frame}
\section{Background information}
\begin{frame}
\frametitle{Background information}
\begin{block}{Slides with \LaTeX}
Beamer offers a lot of functions to create nice slides using \LaTeX.
\end{block}
\begin{block}{The basis}
This style uses the following default styles:
\begin{itemize}
\item split
\item whale
\item rounded
\item orchid
\end{itemize}
\end{block}
\end{frame}
\section{The important things}
\begin{frame}
\frametitle{The important things}
\begin{enumerate}
\item This just shows the effect of the style
\item It is not a Beamer tutorial
\item Read the Beamer manual for more help
\item Contact me only concerning the style file
\end{enumerate}
\end{frame}
\section{Analysis of the work}
\begin{frame}
\frametitle{Analysis of the work}
This style file gives your slides some nice Radboud branding.
When you know how to work with the Beamer package it is easy to use.
Just add:\\ ~~~$\backslash$usepackage$\{$ru$\}$ \\ at the top of your file.
\end{frame}
\section{Conclusion}
\begin{frame}
\frametitle{Conclusion}
\begin{itemize}
\item Easy to use
\item Good results
\end{itemize}
\end{frame}
\end{document}
第二部分叫 ru.sty
% Copyright 2009 by Pim Vullers
%
% This file may be distributed and/or modified
%
% 1. under the LaTeX Project Public License and/or
% 2. under the GNU Public License.
%
% See the file doc/licenses/LICENSE for more details.
%%%
%%% Inherit definitions from existing themes (DO NOT MODIFY THESE)
%%%
% Layout scheme for outer elements: split header and footer
\useoutertheme{split}
% Color scheme for outer elements: use background colors
\usecolortheme{whale}
% Layout scheme for inner elements: rounded elements
\useinnertheme{rounded}
% Color scheme for inner elements: use foreground colors
\usecolortheme{orchid}
%%%
%%% Tweak definitions of inner theme to match personal preferences (MODIFY THESE)
%%%
% Itemize items: default (triangle), circle, square, ball
\setbeamertemplate{itemize items}[circle]
% Enumerate items: default, circle, square, ball
\setbeamertemplate{enumerate items}[circle]
% Outline: default, sections numbered, subsections numbered, circle, square, ball, ball unnumbered
\setbeamertemplate{sections/subsections in toc}[default]
% General blocks:
\setbeamertemplate{blocks}[rounded]
% Title page:
\setbeamertemplate{title page}[default][colsep=-4bp,rounded=true]
% Part page:
\setbeamertemplate{part page}[default][colsep=-4bp,rounded=true]
% Navigation symbols:
\setbeamertemplate{navigation symbols}{}
%%%
%%% Tweak definitions of outer theme to match Radboud (website) style
%%%
% Background
\pgfdeclareimage[width=\paperwidth,height=\paperheight]{bg}{ru_background}
\setbeamertemplate{background}{\pgfuseimage{bg}}
% Colors
\usecolortheme[RGB={190,49,26}]{structure}
\setbeamercolor{frametitle}{parent=subsection in head/foot}
\setbeamercolor{frametitle right}{parent=section in head/foot}
\pgfdeclarehorizontalshading[frametitle.bg,frametitle right.bg]{beamer@frametitleshade}{\paperheight}{%
color(0pt)=(frametitle.bg);
color(\paperwidth)=(frametitle right.bg)}
\AtBeginDocument{
\pgfdeclareverticalshading{beamer@topshade}{\paperwidth}{%
color(0pt)=(bg);
color(4pt)=(black!50!bg)}
}
% Footline: AUTHOR | TITLE | DATE FRAMENUMBER
\defbeamertemplate*{footline}{ru theme}{%
\leavevmode%
\hbox{%
\begin{beamercolorbox}[wd=.25\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
\usebeamerfont{author in head/foot}\insertshortauthor
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.25\paperwidth,ht=2.25ex,dp=1ex,center]{author in head/foot}%
\usebeamerfont{author in head/foot}\insertshortdate
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.416667\paperwidth,ht=2.25ex,dp=1ex,center]{title in head/foot}%
\usebeamerfont{title in head/foot}\insertshorttitle
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=0.083333\paperwidth,ht=2.25ex,dp=1ex,right]{title in head/foot}%
\insertframenumber{} / \inserttotalframenumber\hspace*{2ex}
\end{beamercolorbox}}%
\vskip0pt%
}
\defbeamertemplate*{headline}{ru theme}{%
\leavevmode%
\@tempdimb=2.4375ex%
\multiply\@tempdimb by\beamer@sectionmax%
\pgfdeclareimage[height=.9\@tempdimb]{logo}{ru_logo}%
\logo{\pgfuseimage{logo}}%
\ifdim\@tempdimb>0pt%
\advance\@tempdimb by 1.125ex%
\begin{beamercolorbox}[wd=.5\paperwidth,ht=\@tempdimb]{section in head/foot}%
\vbox to\@tempdimb{\vfil\insertsectionnavigation{.5\paperwidth}\vfil}%
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.4\paperwidth,ht=\@tempdimb,right]{subsection in head/foot}%
\vbox to\@tempdimb{\vfil\vfil\textbf{\footnotesize\insertshortinstitute~~}\vfil}%
\end{beamercolorbox}%
\begin{beamercolorbox}[wd=.1\paperwidth,ht=\@tempdimb,left]{subsection in head/foot}%
\vbox to\@tempdimb{\vfil\insertlogo\vfil\vfil}%
\end{beamercolorbox}%
\fi%
}
\defbeamertemplate*{frametitle}{ru theme}{%
\nointerlineskip%
%\vskip-2pt%
\hbox{\leavevmode
\advance\beamer@leftmargin by -12bp%
\advance\beamer@rightmargin by -12bp%
\beamer@tempdim=\textwidth%
\advance\beamer@tempdim by \beamer@leftmargin%
\advance\beamer@tempdim by \beamer@rightmargin%
\hskip-\Gm@lmargin\hbox{%
\setbox\beamer@tempbox=\hbox{\begin{minipage}[b]{\paperwidth}%
\vbox{}\vskip-.75ex%
\leftskip0.3cm%
\rightskip0.3cm plus1fil\leavevmode
\insertframetitle%
\ifx\insertframesubtitle\@empty%
\strut\par%
\else
\par{\usebeamerfont*{framesubtitle}{\usebeamercolor[fg]{framesubtitle}\insertframesubtitle}\strut\par}%
\fi%
\nointerlineskip
\vbox{}%
\end{minipage}}%
\beamer@tempdim=\ht\beamer@tempbox%
\advance\beamer@tempdim by 2pt%
\begin{pgfpicture}{0.1mm}{0pt}{1.01\paperwidth}{\beamer@tempdim}
\usebeamercolor{frametitle right}
\pgfpathrectangle{\pgfpointorigin}{\pgfpoint{\paperwidth}{\beamer@tempdim}}
\pgfusepath{clip}
\pgftext[left,base]{\pgfuseshading{beamer@frametitleshade}}
\end{pgfpicture}
\hskip-\paperwidth%
\box\beamer@tempbox%
}%
\hskip-\Gm@rmargin%
}%
% \nointerlineskip
% \vskip-0.2pt
% \hbox to\textwidth{\hskip-\Gm@lmargin\pgfuseshading{beamer@topshade}\hskip-\Gm@rmargin}
% \vskip-2pt
}
答案1
要更改文本颜色，您只需使用
\setbeamercolor{normal text}{fg=red}要获得不同的背景图像，您只需
\pgfdeclareimage在演示过程中覆盖即可。
\documentclass{beamer}
\setbeamercolor{normal text}{fg=red}
\pgfdeclareimage[width=\paperwidth,height=\paperheight]{bg}{example-image}
\setbeamertemplate{background}{\pgfuseimage{bg}}
\begin{document}
\begin{frame}
text
\end{frame}
\pgfdeclareimage[width=\paperwidth,height=\paperheight]{bg}{example-image-b}
\begin{frame}
another image
\end{frame}
\end{document}
