Yes, there are 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.