R-Markdown: 无衬线字体

R-Markdown: Serifless font

我正在使用以下降价 header。不幸的是,我的 pdf 中的字体仍然有衬线。我怎样才能在全球范围内改变它? (我试过 \usepackage{uarial}mainfont: Arial

---
title: "Title"
author: "Author name"
header-includes:
- \usepackage[ngerman]{babel}
- \usepackage{uarial}
output:
  pdf_document:
    toc: yes
    toc_depth: 3
    number_sections: yes
  word_document:
    toc: yes
    toc_depth: '3'
mainfont: Arial
fontsize: 13pt
documentclass: article
---

尝试更新命令 \familydefault

---
title: "Title"
author: "Author name"
header-includes:
- \usepackage[ngerman]{babel}
- \renewcommand{\familydefault}{\sfdefault}
output:
  pdf_document:
    toc: yes
    toc_depth: 3
    number_sections: yes
  word_document:
    toc: yes
    toc_depth: '3'
mainfont: Arial
fontsize: 13pt
documentclass: article
---

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