changing iPod dock selections

#1
i don't know if its been previously stated but I just noticed on the bottom of the iPod on the phone, you can change which icons you want on your dock...
It originally came with playlists,artists,songs,videos, and more but if you click edit, you can drag and drop different selections, I.e. I switched out artists for albums... Sorry if this has been mentioned before... I just figured it out :)