Margin affects the theme.

[seanmrnda]

My PDF theme currently extends to the edges of the page. When I add top and bottom margins, the theme gets cut off. Is there a way to add margins without affecting the theme in the PDF output?

Here's how it looks like with margin top-bottom:

Config with margin:

[HollowMan6]

Then you will need to override some theme styling by moving the margin specifications in the CSS files (i.e. css/print.css, which is the style for printer output) instead of in the book.toml. Please refer to the mdBook official documentation: https://rust-lang.github.io/mdBook/format/theme/index.html?highlight=css%20print#theme

Although Chrome determines the PDF rendering logic, the current behavior is reasonable IMO and consistent when printing a picture: the margins are always white. As there's no way to fill in those margins unless GenAI helps here.