增加整个文档或仅增加部分内容的字体大小

Question

如何增加整个文档或者最好只是这一部分的字体大小？

 \begin{center}
       $R_{ecl} = \sqrt{(X_{ecl}^{2} + Y_{ecl}^{2} + Z_{ecl}^{2})}$\\
       $\lambda = \arctan{\frac{Y_{ecl}}{X_{ecl}}}$\\
       $\beta = \arctan{\frac{Z_{ecl}}{\sqrt{(X_{ecl}^{2} + Y_{ecl}^{2})}}}$\\
 \end{center}

Answer 1

例如

 \begin{center}
 \large
       $R_{ecl} = \sqrt{(X_{ecl}^{2} + Y_{ecl}^{2} + Z_{ecl}^{2})}$\\
       $\lambda = \arctan{\frac{Y_{ecl}}{X_{ecl}}}$\\
       $\beta = \arctan{\frac{Z_{ecl}}{\sqrt{(X_{ecl}^{2} + Y_{ecl}^{2})}}}$\\
 \end{center}

还有\Large、、\LARGE和。\huge​\Huge

Answer 2

假设您使用的是 pdfLaTeX，则主要应查看命令\large、\Large和\huge。每个命令代表字体大小比前一个级别增加 20%。要本地化字体大小变化的效果，请将宏放在预定义环境中（例如center）或将它们放在一对\begingroupand\endgroup语句中。

\documentclass{article}
\usepackage[vmargin=1cm]{geometry}
\usepackage{amsmath} % for "gather*" environment
\newcommand\threelines{\par
\begin{gather*}
       R_{ecl} = \sqrt{X_{ecl}^{2} + Y_{ecl}^{2} + Z_{ecl}^{2}}\\
       \lambda = \arctan{\frac{Y_{ecl}}{X_{ecl}}}\\
       \beta = \arctan{\frac{Z_{ecl}}{\sqrt{X_{ecl}^{2} + Y_{ecl}^{2}}}}
\end{gather*}}
\begin{document}

\verb+default font size+
\threelines

\begingroup
\large
\verb+20% larger+
\threelines
\endgroup

\begingroup
\Large
\verb+44% larger+
\threelines
\endgroup

\begingroup
\Huge
\verb+73% larger+
\threelines
\endgroup

\end{document}