Hey @SkyKing,
Thanks for the “Tracked Changes” questions.
How do you add a comment when making a change? Comment field is in Manage but no way to add?
When you get into the “Manage Changes” window, you’ll see 4 columns:
- Action
- Author
- Date
- Comment
That 4th “Comment” column is a little weird… you’re able to get information in there by:
- “Insert Track Change Comment”
Side Note: You are able to do this in desktop:
- LibreOffice
- Collabora Office
Currently, you ARE NOT able to do this in:
- Collabora Online (as of 22.05)
How To Get Text Into “Manage Changes” Comments Column
Method 1: Buttons
You need to enable the “Track Changes” toolbar:
- View > Toolbars > Track Changes
and you’ll have access to a few more advanced buttons:
One is:
- Insert Comment (
Ctrl+Alt+C)- THIS is the one everyone uses to insert comment bubbles within a document.
and the other button is:
- Insert Track Change Comment
- THIS is the one that adds comments inside of Tracked Changes.
- These comments will then appear in the Manage Changes “Comment” column.
Method 2: Menus
In the Standard UI, you can:
- Edit > Track Changes > Comment
For more information on this, see:
and the LibreOffice Writer 7.5 User Guide, especially:
- Chapter 3: “Working with Text: Advanced” > Adding other comments
No support to protect? Document owner wants to approve all changes if set to record but useless if anyone who can edit can disable record or accept all changes.
See the Collabora Help file for “Feature Locking”:
Or maybe I’m missing a setting somewhere? Search turned up nothing on this.
Yes, this “Manage Changes”/“Track Changes” + Comment thing had me stumped too.
I had to fiddle around with a sample document and dig deep into the LO User Guides to figure this one out. 
Let me know if you have any more questions.
Side Note #2: As of today, Collabora Online’s “Manage Changes” menu is also not converted to a JSDialog yet. Follow this Github bug for the latest news on that: