Epson EB X6 - Manual (Page 47)

List of Functions 47
Reset Menu
Sub Menu Function
Reset All You can reset all items in all menus to their default settings.
The following items are not reset to their defaults: "Input Signal", "User's Logo", "Lamp Hours", and "Language".
Reset Lamp Hours You can clear the cumulative Lamp Hours use time, and return it to "0H". Reset it when you replace the lamp.