Use the following steps to adjust the HiHat pedal sensitivity in the TD-4KP:
1. Press MENU.
2. Press the SEL down button to select "8: Pad Settings."
3. Press the OK button.
4. Press SEL down to select "HH Pedal Sens."
5. Turn the +/- dial to adjust the value (-5/+5).
6. Press MENU when you're finished. The new settings are saved automatically.