Featured artists and main artist come are two variants of the same assets, and those assets are you artists.
In other words, you only have one list of artists in your account and you assign them to tracks or album either as main artists or as featured artists.
You assign featured artists by:
- Selecting one or multiple albums or tracks,
- Right-clicking to either choose EDIT/RENAME or MASS EDIT,
- Adding the artist’s name either in the ARTIST field of in the FEATURED ARTIST from inside the edit panel
This video shows you how to assign a featured artist to a selection of track from within an album's track-listing:
Exactly the same process can be applied to assign Main artists