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I'm wondering how to change font and color specifically for figure captions in Rmarkdown for a PDF output. I know how to do this for word output (creating a separate document), but often figures are submitted to journals as PDFs.

Note that this is not whether you can change the color of text in a PDF which is answered here: Changing the font size of figure captions in RMarkdown pdf output. If I try this within the fig.cap = "fig text here.\\label{...}" I get the following error:

! Undefined control sequence.
<recently read> \cellcolor

This probably comes closest: Changing the font size of figure captions in RMarkdown pdf output, but I went to CTAN and downloaded the package and am not sure whether I have to find my R libraries and drag it to there, or what. Perhaps this is the only/easiest solution, if so, can you advise on how I should proceed with the downloaded package. Haven't done a lot in latex, so it would probably be finding how colors are defined in latex as well?

Thanks much!

James

Here is my header:

output:
  pdf_document: 
    keep_tex: true
  html_document: default
header-includes:
  \usepackage{placeins}

---
James
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1 Answers1

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You could try this:

---
title: "Untitled"
author: "bttomio"
date: "6/13/2021"
output: pdf_document
---

```{r setup, include=FALSE}
knitr::opts_chunk$set(echo = TRUE)
```

```{r pressure, echo=FALSE, fig.cap="\\textcolor{red}{This is red} and \\textcolor{blue}{this is blue}"}
plot(pressure)
```

-output

enter image description here

bttomio
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