"The fact that OpenOffice.org Writer is more than a word
processor is an open secret. Designed to write long documents,
Writer is in many ways a document processor comparable to
FrameMaker, suitable for designing books and dissertations while
falling short of a complete desktop publishing solution. For this
reason, it includes a number of tools for tweaking lines of text,
including Tools > Language > Hyphenation and the tools for
adjusting character width and letter space for individual
characters. However, by far the least understood of these high-end
tools is Writer's ability to adjust line-spacing.
"Somewhere in the transitions from a private company to Sun
Microsystem's property to a free software project, exact knowledge
of the line-spacing tools was lost. The central mystery is: how
does Writer control line-spacing by default...?"