if config.full-page {
    cnvs
  } else {
    layout(size => {
      let m = measure(cnvs)
      let w = m.width
      let h = m.height
      let base-w = if type(width) == ratio {
        size.width * width
      } else {
        width
      }
      let r = if w == 0 {
        0
      } else {
        base-w / w
      }

      let new-w = w * r
      let new-h = h * r
      r *= 100%

      box(
        width: new-w,
        height: new-h,
        scale(x: r, y: r, cnvs, reflow: true)
      )
    })
  }