You can pick any of your collabs and feature them on your “channel” tab. To pin a song, open the channel or favorites tab on your profile. Next to the song you want to pin, click the three dots and choose “Pin this Recording”. 

Notes:

• You can only pin one song at a time. If you pin a new song, the previously pinned song will be removed from this section.
• You can pin any song you have taken part in, whether you opened them or just joined. It can be a solo, duet or group song. While you can add other people’s songs to your feature list, you cannot pin them on your profile.