Full width block

Sometimes you want content that spans the whole physical width of your slide, disregarding the page margin. This can be achieved using some annoying calculatings involving page.margin which are luckily already done for you if you use #toolbox.full-width-block!

Note that this only works when the left and right page margin are explicitly specified (i.e. both are neither none nor auto).

This can be very useful for headers and footers.

#set page(
  paper: "presentation-16-9",
  margin: 2cm,
  header: align(top,    toolbox.full-width-block(fill: aqua, inset: 8pt)[I'm up high]),
  footer: align(bottom, toolbox.full-width-block(fill: lime, inset: 8pt)[I'm down low]),
)

#slide[
  #lorem(10)
]