Factory reset can be done on the main track or on the programming track. To reset CV's to there factory setting write a value of 2 into CV8. The reset occurs the moment the decoder gets the reset command. (Earlier decoder versions had to go through a power on/off before the reset occurred.) CV's that will reset to factory default: 1, 2, 3, 4, 5, 6, 17, 18, 19, 29, 30, 49, 50, 53, 54, 55, 56, 57, 61 . The user-loadable speed table is not affected by the reset.
CV8 can also be used to "Quick Configure"
Changing CV8 to these values does NOT affect Factory Resets. Additionally Ditch lights and a Trolley light feature can be configured togther in the same "vehicle".