In the past I've had trouble customizing a existing sheet for my campaigns with adding new things like Attributes (such as for 3rd ed. D&D Sheets). Primarily in that the sheets would not display them or if they did rolls did not work and such. I was wondering if anyone could help try to find a way to add a new Ability Attribute and related things to a D&D 5e sheet such as the one made by Roll20?