That's helpful! I always navigate using the columns rather than the tree, so I never figured that out. I still think the columns should allow the same functionality as the tree, but at least I now know how to do it without having to select all files each time.

In the Media Tree select item and either slow double click, use F2 or right click > Rename.

When viewing Music or Audiobook or any music node in the tree on the left, various columns show up. For example if I click on Music I see Genre, Artist, and Album.

Sometimes I want to change the name of an Album or the name of an Artist or whatever, but doing so requires selecting that thing and then highlighting all songs and then right clicking there and changing things. I should be able to just change the name of the Album right in the column (or at least have the context menu have a Properties option).