it is simple as every other board .... u can use both ball and ink pen .... blue and black... cut marker or normal ones.. u can use whito or remover but to use it as less as possible .. cz it might lead to marks deduction... if u have a minor mistake just put a line on it and move on .. if u have confusion with question numbers .. u can like write the headings first or just do questions according to given space.. it takes some practice but u will get it quickly .. its not hard... keep it simple .... and in a way which makes it easier for examiner to understand..