Select your own time if you want to play shorter or longer.
Select easy for less chance of hard letters like Qu,Z and X to come up.
Max Red Letters:
Select the maximum letters that could appear red for higher scores.
Select random for the whole alpabet for letters to be picked from rather than the Easy, Medium or Hard list of letters.
Select a black box letter to be displayed in all games which unlike red letters that double points, the black letter trebles them.