If Roon has failed to match your album automatically, you'll see the word Unidentified on the album's detail page, like this:
Searching For a Match
To search for a match, start by clicking Unidentified.
If you're trying to improve or correct an already Identified album, click Edit under the 3 dots menu.
From the Album Editor, choose "Identify Album".
Then follow the prompts to search Roon's database and find the best match.
Versions
Keep in mind that in some cases, Roon's database may contain multiple versions of an album, which you can browse by using the arrows:
