Clarification: pages 54 and 78 seem to have a contradiction about how data imprinting and IR film interact. In general, Nikon warns against it because of potential edge fogging, but many have succeeded with the most common IR films. If you want to do imprints while using special purpose film, shoot a test roll first.
p. 81: The imprinting is done on the first frame or between it and the next frame only.
p. 197: The button doesn't have to be held down for FV lock; one press produces the preflash and lock
p. 205: The F6 doesn't preflash when set to Rear sync
p. 218: FV lock stays in place when you zoom or select a different metering method