Click under 'mode' to change it from random to manual, and vise versa. ———————————————————————— This calculator does not use definition; instead, it matches letters and defines the difference of two letters by their postion in the alphabet. For example: The difference of 'A' and 'O' = 14%, because the postion of 'O' in the aplhabet - 15, minus the postion of 'A' in the alphabet - 1, is equal to 14. (This method also concludes empty space as a 0, for words of different lengths) ———————————————————————— Enjoy!!! :)