List icon:
Click this button to see your list of recently played, now playing, and queued songs. From this view, you can also edit (delete and reorder) songs that are queued up for playback.
Time display:
This displays the elapsed time for the current song. Secret tip—click the ‘elapsed time’ to switch to the ‘time remaining’ view instead.
Shuffle:
Click this button to enable Shuffle. This will only shuffle the songs within the current item playing from your Queue, not the entire Queue. Shuffle will remain enabled (through subsequent items in your Queue) until you click it a second time to disable it.
Repeat:
Click this button to enable Repeat for the item you’re playing, and click it a second time to repeat a single song (you’ll see a little “1” appear). This will only repeat what’s currently playing (album or playlist), not your entire list of upcoming songs.
Volume:
Click this icon to display the volume adjustment bar.