LaTeX equations are rendered much smaller in PDF from xaringan slides, with partial_slides = TRUE

[privefl]

E.g. these slides:

---
title: "test"
output:
  xaringan::moon_reader:
    seal: false
    lib_dir: libs
    nature:
      highlightStyle: github
      highlightLines: true
      countIncrementalSlides: false
---

class: title-slide center middle inverse

# Title

---

### Slide 1 with formula $Q = 1 - P$

Formula is smaller here as well: $$Q = 1 - P$$

---

This is what I use to render the slides:

chromote::local_chrome_version(binary = "chrome-headless-shell")
renderthis::to_pdf("test.Rmd", partial_slides = TRUE)

It seems fine when I don't use partial_slides = TRUE.

[jhelvy]

I've had this issue too when I open a slide with LaTeX on it in Chrome. Often the equation font is much smaller, then I refresh the page and it looks correct. For example, on this slide from one of my classes the fraction on the lower left is too small, but if you refresh the page it renders as the correct size. I don't know why this happens with Chrome.

The issue here I think is how Chrome renders the LaTeX. When you use partial_slides = TRUE, internally it basically renders the slides in Chrome and clicks through one page at a time, so when Chrome loads the page it's showing the smaller font size. I wonder if perhaps there is a way to inject a quick page refresh command before rendering each slide? It'd be a bit of a hack but it might just work.

[privefl]

Thanks for the quick response.
This would be a simple effective hack if it works.