1. Not sure where to start? Mix It for Me (top of Song → Mix) sets a starting mix: the drums forward, the bass under them, your voice on top, a little room, a fade at the end. Then move anything you like.
  2. Start with everything a little quieter than you think, then bring the most important thing up — usually the vocal or the melody.
  3. Pan: keep kick, bass, snare and vocal in the middle; spread chords, hats and extras a little left and right.
  4. Solo shows what one instrument really sounds like; Mute shows what the song sounds like without it.
  5. The Beat is one strip: its Volume moves every drum together, keeping their balance, and Solo and Mute cover the whole kit. Each Drum opens them one by one.
  6. Room (in each Effects, and its size in Song → Mix) puts everything in the same space. A little on chords and vocals goes a long way.
  7. Song's Echo works the same way: one echo the whole song shares, in time with the song. Send a little of the vocal or a lead to it in its Effects, and choose how long (a dotted 1/8 is the classic) and how many repeats in Song → Mix. (Delay, in the effects list, is an echo on that one instrument.)