You can add comments to metadata catalog objects and business glossary objects. Metadata Manager stores the comments in the Metadata Manager warehouse and displays them when you view an object.
Metadata Manager displays the most recent comment first. Metadata Manager includes the author name and date and time for the comments. Metadata Manager uses the name of the currently logged in user as the author of the comment.
You can view, add, and delete comments for an object in the Details panel. You cannot edit existing comments. To change a comment, you must delete the comment and add it again. Comments are limited to 4,000 characters.
Metadata objects with a large number of comments may decrease performance when you access the object.