7.1 Render Slides

There are two steps to render slides to pdf:

1. Render Rmd to html with rmarkdown::render
2. Print html to pdf with pagedown::chrome_print

rmarkdown::render('equity_valuation.Rmd')
pagedown::chrome_print('equity_valuation.html')

Two-in-one option:

✅ use renderthis package to render slides and print to pdf in one function.

renderthis::to_pdf('equity_valuation.Rmd')

This will call rmarkdown::render and then pagedown::chrome_print automatically. Will generate equity_valuation.html and equity_valuation.pdf accordingly based on your output formats.

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Issue: Fonts are not embedded / applied in the pdf output.

Fix: Set pdf output font specifically.

@media print {
    body {
        font-family: 'Noto Sans', -apple-system, BlinkMacSystemFont, system-ui, Arial, sans-serif !important;
        font-weight: 400 !important;
    }
    strong, b {
        font-weight: 700 !important;
    }
    /* MathJax font for print */
    .mjx-chtml {
        font-family: 'Georgia Pro', 'Libertinus Serif', serif !important;
        font-weight: 700 !important;
        color: red !important; /* for testing purpose, whether selector is correct */
    }
}

• Note that .mjx-chtml controls math typesetting. The tricky point is that MathJax CommonHTML math uses its own fonts for math rendering, and CSS font-family is NOT respected.

• Color and font-weight may work, but font-family is limited by MathJax’s internal font stack. For true font control, you need to change MathJax’s configuration, which is not easily done in xaringan.

• html output and pdf output may use different fonts.

  Issue: If keeping @import in CSS, I cannot get the font applied in pdf output.

  Fix: What I do, a compromise solution, is to

  • use system font for html output, and
  • specify local font for pdf output.

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