But I kinda don't know how.

It's one for a project I've been working on for a solid few years and I figured this would be a good way for documentation of said project, but... how would I go about it?

I kinda wanna spice it up visually so it looks pretty, y'know? And so that me and others working on the project can get a sort of GUI art direction.

Tips n' tricks are appreciated, and thank you in advance! :]