anchor.diff:      top: 25%
   |===
   
  -[#top]
  +[#logo-top]
   === top
   
  -The `%` unit is relative to content height; `vh` unit is relative to page height.
  +The absolute top position of the logo.
  +The `%` unit is a percentage of the content height, starting from the top of the content area.
  +The `vh` unit is a percentage of the page height, starting from the top of the page.
   
   [#title]
   == title-page-title
  
positive.code:   title:
      text-transform: smallcaps
  
  |<<top,top>>
  |xref:measurement-units.adoc[Measurement] +
  (default: `40%`)
  |[source]
  
negative.code:   logo:
      image: image:logo.png[pdfwidth=25%]
  
  |<<logo-top,top>>
  |xref:measurement-units.adoc[Measurement] +
  (default: `10%`) +
  |[source]
  