Here's how to pan instruments in a Kit in the TD-4:
1. Choose a desired kit to edit.
2. Press the MENU button.
3. Press SEL down to select "2 MIXER.".
4. Press OK.
5. Press cursor down to select "Mixer Pan."
6. Hit a pad that you'd like to change panning for.
7. Turn the +/- dial to adjust the panning (L10-Center -10R).
8. Repeat Steps 6 and 7 for any remaining pads if desired.
9. When you're finished, press MENU. The new setting is saved in the kit automatically.