Revision history of "Documentation/FAQ/Calc/Miscellaneous/I want to select two cells that are not adjacent, but holding down the CTRL key does not seem to work. How can I perform this action?"
From Apache OpenOffice Wiki
Diff selection: Mark the radio boxes of the revisions to compare and hit enter or the button at the bottom.
Legend: (cur) = difference with latest revision, (prev) = difference with preceding revision, m = minor edit.