书本图标题宽度？

Question

我刚刚开始在Bookdown中写我的博士学位论文，到目前为止，一切都很好。但我确实遇到的一个问题是，图形标题在输出为PDF格式时似乎只占据页面宽度的60％左右，并且居中。这对于短标题非常有用，但是对于复杂的面板，我的大多数图形标题的长度都在50个字左右。是否有一些LaTeX魔术可以使它们的页面宽度？

谢谢 汤姆

这是我在.md文件中使用的内容：

| Reagent                  | Amount   |
| ------------------------ | -------- |
| Appropriate Buffer (10x) | 1x       |
| DNA                      | 50-500ng |
| Restriction Enzyme       | 1*U*     |
| Water                    | -        |

Table: (\#tab:restriction-generic) Schematic for restriction digestion with a single restriction enzyme.

Answer 1

您可以使用LaTeX软件包caption：

---
output: 
  bookdown::pdf_document2
header-includes:
- \usepackage[width=\textwidth]{caption}
---

This is an R Markdown document. Markdown is a simple formatting syntax for authoring HTML, PDF, and MS Word documents. For more details on using R Markdown see <http://rmarkdown.rstudio.com>.

| Reagent                  | Amount   |
| ------------------------ | -------- |
| Appropriate Buffer (10x) | 1x       |
| DNA                      | 50-500ng |
| Restriction Enzyme       | 1*U*     |
| Water                    | -        |

Table: (\#tab:restriction-generic) Schematic for restriction digestion with a single restriction enzyme. Some really long text that shows how the caption is formatted when it takes multiple lines.

输出：