Openhab2 Auto configured Hue Settings

Setup, Configuration and Use Beginners
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I’m working on switching from OpenHab1 to OpenHab2. I added the Hue extension, it detected my hub and then detected my bulbs. From the console I can see them listed as items. I’m trying to understand how to put them in groups (like bedroom, all_lights, etc).

My specific questions are:

  1. How is the auto item stuff configured? (I would like to understand the terminology behind the auto config persistence)
  2. Can I configure groups using the OpenHab UI? (I’m pretty sure I’m using Paper UI)
  3. I know how to add groups in file based config for OpenHab 1. Should I just migrate the auto item config to a file based config? Is there a process for that?