Show audio waveforms in DR15?

Hello!
Novice here... I can't figure out how to show the wave form on the audio tracks in my timeline. Thanks in advance for what, I'm guessing, is a really basic question with a glaringly obvious answer.
Novice here... I can't figure out how to show the wave form on the audio tracks in my timeline. Thanks in advance for what, I'm guessing, is a really basic question with a glaringly obvious answer.