Writing Wednesday–“Mind the Gap”!

The London Underground reminds its riders to “Mind the Gap” so they do not trip when entering or exiting a train. The Fifth Circuit’s new typography places a notable gap between paragraphs and footnotes. While this sort of line-spacing does not have a technical label like “kerning,” it is nevertheless an important part of the overall look and feel of a piece of legal writing. What are your thoughts on inter-paragraph line spacing?