2001 Toyota Camry trip a

There is a black rod near the odometer on the cluster. Typically to the right. When you press it it will change the mileage to trip A or Trip B or back to mileage.

FYI:

By holding it in on the trip A or B, it will reset the counter to 0.

This is also used to reset the oil change intervals. By bringing it to the mileage display with the key on is the first step. Turn the key off and hold the bleack rod in again and turn the key on. Little dashes will appears and one by one disappear. The oil change counter is then reset.