R Markdown - changing font size and font type in html output

r knitr r-markdown
Bärbel picture Bärbel · Mar 26, 2015 · Viewed 111.3k times · Source

I am using R Markdown in RStudio and the knit HTML option to create HTML output. However, the font used in the ouput for plain text blocks is rather small and I would like to change it to a differnt font and increase the font size. Can someone show an example how to set the output font - workable without a lot of knowledge in html?

So far I tried at the top of my markdown document, but this doesn't work. 

---
fontsize: 24pt
---

Answer

jmjr picture jmjr · Mar 27, 2015

I think fontsize: command in YAML only works for LaTeX / pdf. Apart, in standard latex classes (article, book, and report) only three font sizes are accepted (10pt, 11pt, and 12pt).

Regarding appearance (different font types and colors), you can specify a theme:. See Appearance and Style.

I guess, what you are looking for is your own css. Make a file called style.css, save it in the same folder as your .Rmd and include it in the YAML header:

---
output:
  html_document:
    css: style.css
---

In the css-file you define your font-type and size:

/* Whole document: */
body{
  font-family: Helvetica;
  font-size: 16pt;
}
/* Headers */
h1,h2,h3,h4,h5,h6{
  font-size: 24pt;
}

Related questions

R - Markdown avoiding package loading messages

I have been using Knitr via R-Studio, and think it is pretty neat. I have a minor issue though. When I source a file in an R-Chunk, the knitr output includes external comments as follows: + FALSE Loading required package: ggplot2 + …

Read More
Plot size and resolution with R markdown, knitr, pandoc, beamer

Doesn't fit on the slide by default, doesn't even print by any other means. Here's the .Rmd: Edit: it seems you have to use plot() in every chunk. Second plot now prints. # Plot should show at high resolution ```{r echo=…

Read More
How to show code but hide output in RMarkdown?

I want my html file to show the code, but not the output of this chunk: ```{r echo=True, include=FALSE} fun <- function(b) { for(a in b) {print(a) return(a * a)} } y <- fun(b) ``` …

Read More