Thunderbird Community Forum

I have just starting using Thundermail and one thing I am trying to understand better is Address Books in Desktop Thundermail in Windows 11. I now have the following under address books: All address books (assume that this is just everything in all the address books), Personal Adress Book (empty), Contacts ( not sure where it comes from, probably 1 or both of the 2 emails of mine I have connected), Contacts (not sure where this came from but looks suspiciously like it comes from my gmail email or emails? as it is a long list), Thundermail Address Book (empty), Collected Addresses (looks like it picks these up from emails I send or receive). I am interested in understanding what forms this initial list of address books, do they continue to reflect changes in the original source address books from outside or are they a once only transfer?), how I can manipulate them, probably to end up with: All address books, and other address books continuing various subsets for convenient access to a smaller list of contacts under these sub address book names. Can I easily copy or move addresses between address books? Documentation already answering many of these questions may already exist? Thanks for any help or advice you may be able to provide.