How should I set up automation for time stretching in the audio block?

How should I set up automation for time stretching in the audio block?I want the speed of the audio block to gradually decrease, just like automating volume adjustments, but I couldn’t find a similar function in the automation window. Can anyone help me? Thank you.

  1. _Set the clip to ‘Music mode’ in sample editor or the pool.
  2. Now it follows the tempo
  3. Automate the tempo