Go to radio screen, (while stopped only) and then to iPod screen. Hold Set button until selection screen comes up. Select artist, album, or playlist and move right. Move up and down the list to select, then move right again. If you selected an album the track list comes up. Move right and select track, then move right again. That'll bring you back to iPod screen and play the selected track.
To change playlists, albums, or artists, whichever mode you're in, push and hold either left (for back) or right (forward) for about 2 to 3 seconds. You'll hear the music stop and let go. You will go to next A/P/A.
Now, unless the problem has been fixed from 2013 to 14 there is a hitch in the album/playlist/artist jump feature and that is when the engine is turned off and restarted the cluster loses its position in the album/playlist/artist list. The next time you push and hold the right/left button to change A/P/A it will jump to the first or last A/P/A in the list. You can then step through the A/P/A list one at a time from there. I haven't had a chance to determine if this is for sure a cluster s/w problem, or an iPod Nano 6th gen problem.
When you turn the bike off and back on the cluster will stay in the last A/P/A played and repeat it (if repeat is selected in the iPod) but will jump to first or last as I say above when you try to change A/P/A.
You can change A/P/A with the right/left buttons while on the move but you cannot go to the selection screen.