facetious1, maybe Joey's post was helpful, maybe not, in any case, I don't think your way to acknowledge it is in order here. Please read the forum rules carefully, and next time think twice before you post in a similar manner, will you?
Regarding your question:
a) The cockpit reference chapter of the manual has a whole section about the PVI, see page 2-58
b) there is a key command reference chart included in the game, where one headline reads "NAV panel controls PVI" and the first entry is "PVI change master mode"
BTW, a good way to find information in the manuals is to use the search function of your PDF reader.
The reason why the manual and tutorials may be somewhat inconsistent regarding the startup procedure is simply that in some cases it does not matter when you switch on a certain device or configure it.