With the release of ArchiCAD 16, many of the new features and new functionality has been outlined in numerous online videos from Graphisoft.

It is also important to be aware that certain settings/workflows have been altered in ArchiCAD 16, that are not explicitly covered in the ArchiCAD 16 Reference Guide.
Some of these settings may be a 'user-preference' that you may want to investigate and change/integrate in your own ArchiCAD Template.

The full list can be found on this ArchiCAD-Wiki page.