How do edit the metadata for individual tracks ?

Metadata can only be modified from a web browser, so be sure that you are logged in on your laptop or desktop computer.  If you’d like to edit metadata for individual tracks, find the track you’d like to edit, and select the “More Options” menu as shown in the screenshot.  Select “Edit Track Details.” From there you will be able to edit:
 

• Track Name
• Track Artist
• Track Number
• Disc Number
• Genre (up to 5 genres may be listed, separated by commas)                                      

Track editing is especially useful for compilation albums, where you can note Track Artist separately from Album Artist, Create Discs, etc.                                                                                                                               

 If you wish to merge a track into a different album, simply select the track you’d like to merge, click the “More Options” menu to edit the Track Artist and Album Title details to be identical to the album you wish to merge to. Then click “save” and your selections will now be merged.