使用 XeLatex 和 fontspec 自定义字体大小 class

Question

我正在处理几个属于一起的乳胶模板（信件、文章、报告）。我已经实现了几乎所有的目标，除了一个目标，使用 \documentclass[.pt]{} 命令更改字体大小，无论我使用 9pt 还是 12pt，我的文档看起来都一样。我如何确保这适用于我的自定义 class?

只是一些旁注，我使用 XeLaTex 编译我的文档，同时我使用 fontspec 包和 \setromanfont{DejaVu Serif} 命令安装字体（DejaVu 系列）。 classes 可以选择在系列中的衬线字体和无衬线字体之间切换。

这是我的最小工作示例： 由 letter.tex 文件组成。

% !TeX encoding = UTF-8
% !TEX TS-program = xelatex

\documentclass[12pt, british]{letter-Bram}

% Sender information
\signature{Sender Full Name}
\address{Sender\ Adress line 1\ Adress line 2\ Country}

\begin{document}
\begin{letter}{Recipient\ Organization\ Adress line 1\ Adress line 2\ Country}
    \opening{Dear Recipient,}
    This letter is send from the sender to the recipient, and styled in a sans-serif font. The class has the following class settings:
    \begin{description}
        \item[sans] To turn the document and math into a sans serif font.
        \item[lanuage] You can specify the language like normal. For example \enquote*{dutch}, \enquote*{british}, \enquote*{german}, defaults to \enquote*{american}. I recommend specifying a language as this does set quotation marks, date notations, hyphenation and others.
    \end{description}

    Here is an example equation:
    \begin{equation}
        a x^2 + b x + c = 0
    \end{equation}
    which can be solved with the standard $abc$ formula.

            
    \closing{Kind Regards,}
\end{letter}
\end{document}

这里是 letter-Bram.cls class 文件。

\NeedsTeXFormat{LaTeX2e}
\ProvidesClass{letter-Bram}[2019/07/01 v1.1 letter-Bram]

%%%%%%%%%%%%%%%%%%%%%
% NEW CLASS OPTIONS %
%%%%%%%%%%%%%%%%%%%%%
\newif\if@sans
\DeclareOption{sans}{\@sanstrue}
\DeclareOption*{\PassOptionsToClass{\CurrentOption}{article}}

\ProcessOptions\relax
\LoadClass{letter}

%%%%%%%%%%%%%%%%%
% LOAD PACKAGES %
%%%%%%%%%%%%%%%%%
\usepackage{babel}
\RequirePackage[fleqn]{amsmath} % needs before math font selection
\RequirePackage{csquotes} % proper quotation marks

%%%%%%%%%%%%%%
% LOAD FONTS %
%%%%%%%%%%%%%%
\RequirePackage{fontspec}
\setromanfont{DejaVu Serif}    % open serif font.
\setsansfont{DejaVu Sans}      % open sans font.
\setmonofont{DejaVu Sans Mono} % open mono font.
\if@sans
    \renewcommand{\familydefault}{\sfdefault}
    \RequirePackage{arevmath} % math font that is equal in style DejaVu Sans, but better a, nu, omega, l, x ect
    \SetSymbolFont{symbols}{bold}{OMS}{zavm}{m}{n} % surpress warning of bold math sybols
\else
    \usepackage{unicode-math}
    \setmathfont{DejaVu Math TeX Gyre} % math font equal in style and size to DejaVu Serif
    \SetSymbolFont{symbols}{bold}{OMS}{zavm}{m}{n}
\fi

我很确定我遗漏了一些非常明显的东西，但找不到它。

Answer 1

两个问题：

您的 class 正在加载 letter class，但将其选项传递给 article class。下定决心，class你真正想要哪一个
9pt 不是有效选项，尝试使用 10pt 与 12pt

\NeedsTeXFormat{LaTeX2e}
\ProvidesClass{letter-Bram}[2019/07/01 v1.1 letter-Bram]

%%%%%%%%%%%%%%%%%%%%%
% NEW CLASS OPTIONS %
%%%%%%%%%%%%%%%%%%%%%
\newif\if@sans
\DeclareOption{sans}{\@sanstrue}
\DeclareOption*{\PassOptionsToClass{\CurrentOption}{letter}}

\ProcessOptions\relax
\LoadClass{letter}

%%%%%%%%%%%%%%%%%
% LOAD PACKAGES %
%%%%%%%%%%%%%%%%%
\usepackage{babel}
\RequirePackage[fleqn]{amsmath} % needs before math font selection
\RequirePackage{csquotes} % proper quotation marks

%%%%%%%%%%%%%%
% LOAD FONTS %
%%%%%%%%%%%%%%
\RequirePackage{fontspec}
\setromanfont{DejaVu Serif}    % open serif font.
\setsansfont{DejaVu Sans}      % open sans font.
\setmonofont{DejaVu Sans Mono} % open mono font.
\if@sans
    \renewcommand{\familydefault}{\sfdefault}
    \RequirePackage{arevmath} % math font that is equal in style DejaVu Sans, but better a, nu, omega, l, x ect
    \SetSymbolFont{symbols}{bold}{OMS}{zavm}{m}{n} % surpress warning of bold math sybols
\else
    \usepackage{unicode-math}
%    \setmathfont{DejaVu Math TeX Gyre} % math font equal in style and size to DejaVu Serif
    \SetSymbolFont{symbols}{bold}{OMS}{zavm}{m}{n}
\fi

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