It’s not something I make much mention of, but I am a Moderator for Adobe with the community help. Help from Lightroom goes through the design centre, with actual help being the first link. Here’s 2 options for you instead of going through the design centre.
So why is help online? Well Adobe are hoping to make it more interactive with comments and moderators. It’s not so useful in the Jungle or on Plane though, hence the PDF. But of course you need to go online to get that! At least now you know you can get it before heading in offline territory.