Question Does the D-Two have a shortcut for changing the delay time quickly

Yes, there are actually several ways to change delay time on the D-Two:
  1. Hit "Delay/Tap" once and dial the adjacent Adjust wheel. 
  2. Hit "Delay/Tap" in the tempo that you want the delays to reflect.Tip: Use the "Subdivisions" to automatically calculate the right delay time. Subdivision short cut: Press and hold the "Delay/Tap" key while dialing the adjacent wheel. 
  3. Hit the "Edit" key, scroll to the "Delay time" and dial in the desired Delay time.