如何将 tikzpicture 居中？现在，它似乎从左边距开始。
这是我的代码：
\documentclass{beamer}
% choose theme (warning, to use the UniBern theme you need to copy the files beamerthemeUniBern.sty and ublogo.pdf in the same directory)
\usetheme{theme1}
% packages
\usepackage{graphicx}
\usepackage{hyperref} % allows clickable urls
\usepackage{tikz}
\usepackage{listings} % show code
\usepackage{dsfont} % show code
\usepackage{fontawesome}
\usepackage{tikz}
\usetikzlibrary{snakes}
\usetikzlibrary{positioning}
\newlength\yearposx
\makeatletter
\def\blfootnote{\gdef\@thefnmark{}\@footnotetext}
\makeatother
\definecolor{lightgrey}{RGB}{245,245,245}
% slide numbering
\setbeamertemplate{sidebar right}{}
\setbeamertemplate{footline}{%
\hfill\usebeamertemplate***{navigation symbols}
\hspace{1cm}\insertframenumber{}/\inserttotalframenumber}
% define title page
% begin document
\begin{document}
\frame{
\frametitle{a}
%till 2000
\scalebox{0.7}{
\begin{tikzpicture}[
node distance=1.5 cm and 0.8cm,
ar/.style={->,>=latex,thick},
mynode/.style={
draw,
line width=1pt,
text width=3cm,
minimum height= 1 cm,
align=center
}
]
\node[mynode,text width=3cm, fill=lightgrey] (c1) at (0,0) {Diagnosed};
\node[mynode,text width=3.5cm, fill=lightgrey, below=1cm of c1] (c2) {blablabla \\[1cm]$ $};
\node[mynode,text width=3.5cm, fill=lightgrey, below=1cm of c2] (c3) {blablabla \\[1cm]$ $};
\node[align=center,text width=3cm,left=2cm of c2] (c2_3) {First-line \\ blbla};
\node[align=center,text width=3cm,left=2cm of c3] (c3_3) {Second-line \\ blbla};
\node[draw,align=center,text width=18cm,below left =1cm and -11cm of c3] (text1) {\textbf{aaa}: Very long long long text 1 \hspace{0.5cm}
\textbf{aaa}: Very long long long text 2\hspace{0.5cm}
\textbf{aaa}: Very long long long text 3};
\draw[->,thick] (c1) -- (c2);
\draw[->,thick] (c2) -- (c3);
\end{tikzpicture}}
}
\end{document}
以下是主题：
\RequirePackage{calc}
\RequirePackage{etoolbox}
\mode<presentation>
\newdimen\beamer@ubBorderHeight
\newdimen\beamer@ubTitleHeight
\newdimen\beamer@ubFooterHeight
\newdimen\beamer@ubOverlap
\beamer@ubOverlap=0.2pt
\beamer@ubBorderHeight=0.015\paperheight
\beamer@ubTitleHeight=0.125\paperheight
\beamer@ubFooterHeight=0.032\paperheight
\definecolor{ubRed}{HTML}{E6002E}
\definecolor{ubGrey}{RGB}{255,255,255}
\ProcessOptionsBeamer
\setbeamercolor{normal text}{fg=black}
\setbeamercolor{alerted text}{fg=ubRed}
\setbeamercolor{itemize item}{fg=ubRed}
\setbeamercolor{itemize subitem}{fg=ubRed}
\setbeamercolor{example text}{fg=black}
\setbeamercolor{structure}{fg=black}
\setbeamercolor{date in title page}{fg=black}
% set fonts
\RequirePackage[scaled]{helvet}
\renewcommand*\familydefault{\sfdefault}
\usefonttheme[onlymath]{serif}
\RequirePackage{iftex}
\ifPDFTeX
\RequirePackage[T1]{fontenc}
\RequirePackage[utf8]{inputenc}
\fi
\setbeamerfont*{structure}{series=\bfseries}
\setbeamerfont*{title}{size*={18}{22}}
\setbeamercolor*{title}{bg=ubRed}
\setbeamerfont*{subtitle}{size*={18}{22}}
\setbeamerfont*{author}{size*={10}{12},series=\bfseries}
\setbeamerfont*{institute}{size*={10}{12}}
\setbeamerfont*{frametitle}{size*={18}{22}}
\setbeamercolor*{frametitle}{fg=ubRed}
\setbeamerfont*{framesubtitle}{size*={18}{22}}
\setbeamercolor*{framesubtitle}{fg=black}
\setbeamerfont*{date}{size*={8}{10}}
\setbeamerfont*{headline}{size*={8}{10}}
\beamertemplatenavigationsymbolsempty
\defbeamertemplate*{title page}{uni bern}{%
% list trick from https://texfaq.org/FAQ-chngmargonfly
\begin{list}{}{
\setlength{\listparindent}{\parindent}%
\setlength{\itemindent}{\parindent}%
\setlength{\parsep}{\parskip}%
\setlength{\leftmargin}{0pt}%
\setlength{\rightmargin}{0pt}}
\item[]
\vspace*{\stretch{2}}
{\usebeamerfont*{title}\color{ubRed}\inserttitle\par} % no idea why usebeamercolor{title} does not work here
{\usebeamerfont*{subtitle}\insertsubtitle\par}
\vspace{\stretch{1}}
{\usebeamerfont{author}\insertauthor\par}
{\usebeamerfont{date}\insertdate\par}
\vspace*{\stretch{2}}
\end{list}
% \end{minipage}
}
\defbeamertemplate*{background canvas}{uni bern}{%
\begin{minipage}[t]{\paperwidth+10pt}
\setlength{\baselineskip}{0pt}
\setlength{\lineskip}{-\beamer@ubOverlap}
\setlength{\parskip}{0pt}
\ifnumgreater{\c@framenumber}{1}{}{}
\ifnumgreater{\c@framenumber}{2}{
\ifdefempty{\insertframesubtitle}{
\rule{0pt}{6ex+\beamer@ubTitleHeight}\\
\color{ubGrey}\rule{\paperwidth}{\paperheight-\beamer@ubTitleHeight-\beamer@ubFooterHeight-6ex}
}{
\rule{0pt}{6ex+2\beamer@ubTitleHeight}\\
\color{ubGrey}\rule{\paperwidth}{\paperheight-2\beamer@ubTitleHeight-\beamer@ubFooterHeight-6ex}
}
}{}
\end{minipage}
}
\defbeamertemplate*{headline}{uni bern}{%
\ifnumgreater{\c@framenumber}{2}{
\vspace{3.5ex}
\hspace{4.5ex}\inserttitle
}{}
}
\defbeamertemplate*{frametitle}{uni bern}{
\begin{minipage}[b]{\textwidth}
\vspace{0.5ex}
\raggedright
\vspace{3.5ex}
{\insertframetitle\par}
{\usebeamerfont{framesubtitle}\usebeamercolor*{framesubtitle}\insertframesubtitle}
\end{minipage}
}
% set bullets
\defbeamertemplate*{itemize item}{uni bern}{$\bullet$}
\defbeamertemplate*{itemize subitem}{uni bern}{$\bullet$}
\setbeamersize{text margin left=4ex}
\setbeamersize{text margin right=4ex}
\mode<all>
答案1
如果你想居中某物超出\textwidth（因此不会居中，而是左对齐），通常有助于假装某物宽度为零。
\begin{center}
\makebox[0pt]{%
something%
}
\end{center}
确保没有多余的空格，因为这些空格可能会带来某物偏离中心。
\documentclass{beamer}
% choose theme (warning, to use the UniBern theme you need to copy the files beamerthemeUniBern.sty and ublogo.pdf in the same directory)
\usetheme{theme1}
% packages
\usepackage{graphicx}
\usepackage{hyperref} % allows clickable urls
\usepackage{tikz}
\usepackage{listings} % show code
\usepackage{dsfont} % show code
\usepackage{fontawesome}
\usepackage{tikz}
\usetikzlibrary{snakes}
\usetikzlibrary{positioning}
\newlength\yearposx
\makeatletter
\def\blfootnote{\gdef\@thefnmark{}\@footnotetext}
\makeatother
\definecolor{lightgrey}{RGB}{245,245,245}
% slide numbering
\setbeamertemplate{sidebar right}{}
\setbeamertemplate{footline}{%
\hfill\usebeamertemplate***{navigation symbols}
\hspace{1cm}\insertframenumber{}/\inserttotalframenumber}
% define title page
% begin document
\begin{document}
\frame{
\frametitle{a}
%till 2000
\begin{center}
\makebox[0pt]{%
\scalebox{0.7}{%
\begin{tikzpicture}[
node distance=1.5 cm and 0.8cm,
ar/.style={->,>=latex,thick},
mynode/.style={
draw,
line width=1pt,
text width=3cm,
minimum height= 1 cm,
align=center
}
]
\node[mynode,text width=3cm, fill=lightgrey] (c1) at (0,0) {Diagnosed};
\node[mynode,text width=3.5cm, fill=lightgrey, below=1cm of c1] (c2) {blablabla \\[1cm]$ $};
\node[mynode,text width=3.5cm, fill=lightgrey, below=1cm of c2] (c3) {blablabla \\[1cm]$ $};
\node[align=center,text width=3cm,left=2cm of c2] (c2_3) {First-line \\ blbla};
\node[align=center,text width=3cm,left=2cm of c3] (c3_3) {Second-line \\ blbla};
\node[draw,align=center,text width=18cm,below left =1cm and -11cm of c3] (text1) {\textbf{aaa}: Very long long long text 1 \hspace{0.5cm}
\textbf{aaa}: Very long long long text 2\hspace{0.5cm}
\textbf{aaa}: Very long long long text 3};
\draw[->,thick] (c1) -- (c2);
\draw[->,thick] (c2) -- (c3);
\end{tikzpicture}}}
\end{center}
}
\end{document}