markdown字体大小设置_Rmarkdown字体大小和标题

I recently opened a standard Rmd file without editing anything. The default file looks like this:

Untitled.rmd

---

title: "myfile"

author: "Me"

date: "May 25, 2015"

output: html_document

fontsize: 12pt

---

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 .

When you click the **Knit** button a document will be generated that includes both content as well as the output of any embedded R code chunks within the document. You can embed an R code chunk like this:

```{r}

summary(cars)

```

You can also embed plots, for example:

```{r, echo=FALSE}

plot(cars)

```

Note that the `echo =