The HPD-20 has an "Undo" feature which lets you undo an edit change that you've made to an instrument or a Kit. For example, if you've edited the pitch of an instrument in a Kit, and decide that you no longer want to keep the changes you've made, use the Undo feature to bring back the original settings.
1. Press and hold the SHIFT button and then press KIT(UNDO) - "Undo Kit. Are you sure?" appears in the display.
2. Release SHIFT and KIT and then press the cursor right arrow button(>) to highlight "YES."
3. Press ENTER.