Download the Manual
Download here the most recent pdf version of the NOP User Guide - Protected Portal (requiring login)
The online HTML version of the NOP Help will be maintained and kept up to date on a regular basis. The pdf manual, on the contrary, will only be generated on more important revisions.
As a result, the pdf version (and the material printed from it) can be potentially outdated by the time you wish to use it.
Whenever in doubt, please always refer to the online version for the most recent information.