Returns an output format for bookdown::render_book().
slides(toc = TRUE, ...)display a table of content after the title slide
currently ignored
location: optional text placed on the title slide below the (sub)title.
institute: optional text placed on the title slide below the author.
toc: add a slide with the table of content.
Defaults to TRUE.
toc_name: slide title for the table of content.
Defaults to Overzicht when missing.
cover_photo: the relative path to the image you want on the cover.
When missing, you get a default picture.
cover_horizontal: When omitted, scale the cover_photo so that it covers
the full page vertically.
When set to any value but FALSE or empty, scale the cover_photo so that
it covers the full page horizontally.
cover_offset: A measurement like 8mm or -1.5cm.
Positive values move the cover_photo upwards on the title slide.
Negative values move the cover_photo downwards.
cover_hoffset: Similar as cover_offset but moves cover_photo
horizontally.
Positive values move it to the right, negative values to the left.
aspect: the required aspect ratio for the slides.
Defaults to "16:9".
See the section below for a list of the available aspect ratios.
fontsize: Size of the normal text on the slides.
Other elements are scaled accordingly.
Defaults to "11pt".
See the section Aspect_ratio for more details.
website: URL in the sidebar.
Defaults to vlaanderen.be/inbo.
The table below lists the available aspect ratios and their "paper size". The main advantage of using a small “paper size” is that you can use all your normal fonts at their natural sizes. E.g. an 11pt font on a slide is as readable as an 11pt font on a A4 paper.
| aspect | ratio | width | height |
| 16:9 | 1.78 | 160.0 mm | 90 mm |
| 16:10 | 1.60 | 160.0 mm | 100 mm |
| 14:9 | 1.56 | 140.0 mm | 90 mm |
| 3:2 | 1.50 | 135.0 mm | 90 mm |
| 1.4:1 | 1.41 | 148.5 mm | 105 mm |
| 4:3 | 1.33 | 128.0 mm | 96 mm |
| 5:4 | 1.25 | 125.0 mm | 100 mm |