What is the difference between the Help Contents and Reference Manual?

The Help Contents can be opened using Help > Help Contents from the Main Menu bar. It is setup to be Context Sensitive so you can click on an icon or screen area and it will take you to that section. In addition, you can also use Ctrl-F to open a search window.

The Reference Manual contains the same information, but is setup to be printed should one want a version to place in a binder. It is a large document and can be taken to a commercial print shop if desired. 

The reference manual can be found by clicking Single Page on the top menu bar of the documentation.

The User Guide contains higher level descriptions of workflow. It can be found by clicking User Guide on the top menu bar of the documentation.