The poster’s question is very incompetent. Calligraphy cannot be called format, it should be called composition.
Generally, a complete calligraphy work includes the main text, signature, seal (introductory chapter, name seal, waist seal, etc.)
Calligraphy is a university subject, and some people write it. A single word is already very good, but when these words are written into a work, it becomes a very poor work. There are also people who participated in calligraphy competitions and were already very good at single words, but they failed to win the prize because of irregular composition.
There are also many profound theories and standards for composition. The composition of each calligraphy style of Zhen Cao Li Zhuan Xing is also different, and the font size is also related to the composition. Banners, couplets, nave and banners are also different.
There are also many books on composition. Yang Zaichun’s books on running script and cursive writing are widely circulated in the market, and you can refer to them for reference. There are also many lectures and books on regular script by Tian Yunzhang, and others can also be found in Search online or visit a bookstore.
This question of the poster requires a thick book to answer, so it is difficult to answer. It might be better if the question is more specific and detailed.