In AutoCAD 2016 they have extended the Help file to make it even easier to access help to related content and tools.
As before you can access the Help file from the traditional ways, typing a question mark on the command line, or the F1 function key, by using the Help button on the info center, and my favorite; hovering your cursor or a tool in the Ribbon and pressing the F1 function key to take you straight to the topic.
In AutoCAD 2016 you are automatically signed into the Help documentation when you log into you A360 account and vice-versa. Once you are in the help file you can LIKE certain topics for ease of access later. The content filter allows you to search through the User, Developer and Administrator guides to better assist you in a more content related search.