正如标题所说，我想用例如更改文档的字体
\usepackage[T1]{fontenc}
\newcommand{\changefont}[3]{
\fontfamily{#1} \fontseries{#2} \fontshape{#3} \selectfont}
\changefont{phv}{b}{sl}
但它不起作用。没有任何变化。字体保持不变。我已经尝试了不同的字体。
这是我的代码：
\documentclass{book}
\usepackage{geometry}
\geometry{left=4cm,right=3cm, top=2cm, bottom=2cm}
\usepackage[pagestyles]{titlesec}
\titlespacing*{\chapter}{0pt}{-30pt}{20pt}
\titleformat{\chapter}[display]{\color{headercolor}\normalfont\huge\bfseries}{\chaptertitlename\ \thechapter}{20pt}{\Huge}
\titleformat{\section}
{\color{headercolor}\normalfont\Large\bfseries}{\thesection}{1em}{}
\titleformat{\subsection}
{\color{headercolor}\normalfont\Large\bfseries}{\thesubsection}{1em}{}
\titleformat{\subsubsection}
{\color{headercolor}\normalfont\large\bfseries}{\thesubsubsection}{1em}{}
\titleformat{\paragraph}
{\color{headercolor}\normalfont\normalsize\bfseries}{\theparagraph}{1em}{}
\usepackage[T1]{fontenc}
\newcommand{\changefont}[3]{
\fontfamily{#1} \fontseries{#2} \fontshape{#3} \selectfont}
\changefont{phv}{b}{sl}
\usepackage[ngerman]{babel}
\usepackage{mathptmx}
\usepackage{helvet}
\usepackage{wallpaper}
\usepackage{color}
\usepackage[final]{pdfpages}
%,bookmarksopenlevel={1}
%\usepackage[hidelinks,bookmarks=true,bookmarksopen=true,bookmarksnumbered=true,colorlinks=true,linkcolor=black,]{hyperref}
\usepackage[hidelinks,bookmarksopen=false,
hypertexnames=TRUE,pdfpagelabels=true]{hyperref}[2011/02/05]%colorlinks,linkcolor=black,
\hypersetup{
pdftitle={},
% pdfauthor={},
pdfsubject={satistics book},
pdfkeywords={},
}
\usepackage{xcolor,bookmark}
\usepackage{scrextend}
\usepackage{titlepic}
\usepackage{shorttoc}
\usepackage{courier}
\usepackage{type1cm}
\usepackage{zref-abspage}
\usepackage{makeidx}
\usepackage{graphicx}
\usepackage{multicol}
\usepackage[bottom]{footmisc}
\usepackage{tocstyle}
\usetocstyle{allwithdot}
%\usepackage{thmbox}
\usepackage{shadethm}
\usepackage{amsthm}
\usepackage{amsmath}
\usepackage{marginnote}
%\usetocstyle{KOMAlike}
\usepackage{wrapfig}
\usepackage{paralist}
\usepackage{amssymb}
\usepackage[framemethod=tikz]{mdframed}
\usepackage{ulem}
\usepackage{fancyhdr}
%\usepackage{sectsty}
\usepackage{booktabs}
\makeindex
\listfiles
\newmdenv[backgroundcolor=textbeispiel,linecolor=blue,roundcorner=10pt,outerlinewidth=1pt,skipbelow=2pt, skipabove=6pt]{myframedenv}%innerlinecolor=green,innerlinewidth=1pt,middlelinewidth=2pt,middlelinecolor=yellow
\newtheoremstyle{mystyle}
{}{}{}{}%
{\bfseries}{:}{.5em}{}%
\newtheoremstyle{mystyle2}
{}{}{}{}%
{\bfseries}{}{.5em}{}%
\theoremstyle{mystyle}
\newmdtheoremenv[hidealllines=true,backgroundcolor=shadethmcolor,skipabove=\topsep,
skipbelow=\topsep]{beispiel}{Beispiel}
\newmdtheoremenv[hidealllines=true,
backgroundcolor=shadethmcolor2,skipabove=0pt,
skipbelow=0pt]{formel}{Formel}
\theoremstyle{mystyle2}
\newmdtheoremenv[hidealllines=true,
backgroundcolor=aufgaben,skipabove=0pt,
skipbelow=0pt]{aufgabe}{Aufgabe}
\newmdtheoremenv[hidealllines=true,
backgroundcolor=loesung,skipabove=0pt,
skipbelow=0pt]{loesung}{L\"osung}
\definecolor{dunkelgruen}{rgb}{0.8,0.87843,0.8}
\definecolor{hellgruen}{rgb}{0.90196,0.941176,0.90196}
\definecolor{aufgaben}{rgb}{0.9333,0.93333,0.933333}
\definecolor{headercolor}{rgb}{0.6941,0.6745,0.4863}
\newpagestyle{mystyle}{
\headrule \sethead[\thepage][][\color{red} \chaptertitlename\ \thechapter. \chaptertitle]
{\color{red} \thesection\ \sectiontitle}{}{\thepage}}
\setlength{\headheight}{24pt}%
\begin{document}
\frontmatter
\setlength{\marginparwidth}{3cm}
\marginparsep = 0.4cm
\pagestyle{plain}
\pagenumbering{Roman}
\makeatletter
\let\stdl@part\l@part
\renewcommand*{\l@part}[2]{%
\stdl@part{\textcolor{headercolor}{#1}}{\textcolor{headercolor}{#2}}}
\let\stdl@chapter\l@chapter
\renewcommand*{\l@chapter}[2]{%
\stdl@chapter{\textcolor{headercolor}{#1}}{\textcolor{headercolor}{#2}}}
\makeatother
\setcounter{tocdepth}{4}
\setcounter{secnumdepth}{4}
\shorttableofcontents{Inhalts\"ubersicht}{1}
\bookmark[page=15,rellevel=1,keeplevel,view={XYZ},color=red]{Inhalts\"ubersicht}
\bookmark[page=17,rellevel=1,keeplevel,view={XYZ},color=red]{Inhaltsverzeichnis}
\tableofcontents
\clearpage
\pagenumbering{arabic}
%
%\pagestyle{mystyle}
\mainmatter%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\pagestyle{fancy}
\fancyhf{}
%\fancyhead[L]{\parbox{0.7\textwidth}{\textbf{ \textcolor{headercolor}\leftmark\textcolor{headercolor}{\rightmark}}}}
%\fancyhead[L]{ \textcolor{headercolor}{\rightmark}}%\thesection%\textcolor{headercolor}\text{ }\leftmark \text{ }
\fancyhead[L]{\hspace{2mm}\textcolor{headercolor}{\leftmark}\text{ }\textcolor{headercolor}{\rightmark}\hfill\textcolor{headercolor}{\thepage}\hspace{4mm}}
\renewcommand{\headrule}{\vspace{-\headheight}\textcolor{headercolor}{\vrule height \headheight width 2pt\relax\rule{\textwidth-8pt}{2pt}\vrule height \headheight width 2pt\relax}}
%\include{part1}
%\include{chapter1}
%\include{chapter2}
%\include{part2}
%\include{chapter3}
%\include{chapter4}
%\include{chapter5}
%\include{chapter6}
\backmatter
\appendix
\include{appendix}
\listoffigures
\newpage
\listoftables
\backmatter%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%\include{glossary}
%\include{solutions}
\cleardoublepage
\phantomsection
\addcontentsline{toc}{part}{Index}
\printindex
\cleardoublepage
\phantomsection
\addcontentsline{toc}{part}{the author}
%\includepdf{author}
%\includepdf{back}
\end{document}
我给了你这么多代码，因为我不知道我的错误在哪里？
答案1
如果你想排版一切用倾斜的 Helvetica 粗体字体，然后
\renewcommand{\rmdefault}{phv}
\renewcommand{\sfdefault}{phv}
\renewcommand{\mddefault}{b}
\renewcommand{\bfdefault}{b} % Helvetica has no bx series
\renewcommand{\updefault}{sl}
在你的序言中这样写就够了。我认为这不是一个好主意。
答案2
M 代表最小。
已经有一个用于字体设置的宏：
\usefont{T1}{phv}{b}{sl}您想在序言中使用哪种字体？没有要排版的文本。
您可能想要设置标题的字体。您必须将其包含
\usefont在标题的定义中。
在这个 MWE 中，甚至你的命令也能起作用：
\documentclass{book}
\usepackage[T1]{fontenc}
\usepackage{mathptmx}
\usepackage{helvet}
\begin{document}
\usefont{T1}{phv}{b}{sl}
Testing
\end{document}
对于标题的更改确实包括 \changefont/\usefont在其定义中，例如，
\usepackage[pagestyles]{titlesec}
\titleformat{\section}
{\usefont{T1}{phv}{b}{n}\Large\bfseries}{\thesection}{1em}{}
要更改正文字体，请使用以下命令：
\renewcommand*{\rmdefault}{phv}
（但由于 ，因此自动使用 Helvetica \usepackage{helvet}。）