Database collections

Hello,

I have several questions pertaining to database collections:

  1. How do you rename a database collection?

  2. Why can’t you edit the tag name for database fields?
    The first field in a new collection is always called Title with a tag name of title and it cannot be changed.

  3. Could you clarify the requirements to be able to delete a field from a database collection? Sometimes the move to trash menu option is enabled and sometimes it’s not.

Thank you