Edit Details in Library Collections?

In https://www.chess.com/article/view/chess-com-month-in-review-june-2021, the article stated:

         You can now edit the Details of off-site games in your Library Collections.

My question is: how does one do that?

My current awkward procedure -- if I want to edit a game in my library -- is:

1. bring up the game into analysis make edits/changes -- and save it
2. delete the game from the library (because it appears you can't put a game you already have into the library, even if there are changes)
3. then re-add it to the library -- which screws up the order, since one can't alter the order of the games that appear in the library

And so, my question is: what's changed? What can I do now in the library that I couldn't do before, and how do I do it?

It'd be great if:

1. We could re-save a game into the library without having to delete the old one first
2. Do editing of games in the library (even just the details -- it's unclear how one does that)
3. We could re-order the games in the library

My main theory:

You edit the details by editing the PGN before pressing upload.

1: Copy the PGN from non-chess.com site.

2: Paste it into "Paste PGN" box. 

3: Before pressing upload, edit the PGN to change the details.

My alternate theory:

You can paste lichess game links into the "game link" box even though it says chess.com only.

But that's not really editing a game that's "in" the library (which is what the claim in the article is).

When you edit the details in a Library game you can switch back to the Analysis tab and click the save button there.

I found that after your edit you can "Add to library" and it makes a copy of the game in your library.