With the new interface for V16 a few items have been moved to a new location

One of these is the Cladding Reference Origin which you will be familiar with in V14 and V15:

This is still in the Cladding Settings but now contained within the drop down menu to its own settings page:

There you can set out what origin you want to use and set the offset you require:

Tags: Coverings, User interface, wall covering