You may need to adjust your attribute scores without impacting how the rest of your sheet calculates its abilities. This is especially valid for the Psychic class, whose technique allows heroes to cannibalize their attribute points for magic points. To do this, click the lock icon next to the attribute and this will allow you to keep track of a separate attribute value for that score.
Keeping track of your stats (Hit Points, Magic Points, Armor Points, and Fate Points) is as easy as clicking into the field for the value of the stat and entering a new value. A green, yellow, and red status indicator displays how close you are to depleting the stat.