This lets you enter a factor which will be multiplied by all labor units taken off. Lab Factor can be a number up to 99.99.
The AUTO checkbox to the right of the Lab Factor field indicates Auto-Default. If marked, your entry here will be the default in Takeoff (if you change the Labor Factor in Takeoff, the Labor Factor will return to this default after the next Takeoff entry). When Auto-Default is on, the Lab Factor is red in the Options display in Takeoff. If AUTO is unmarked, the Lab Factor will remain at its setting in Takeoff until you change it.