composition guide
reduce the opasity so that it doesn't get in the way in the background or in the drawing itself
red: centered composition to keep a reference point
blue: divides the drawing, which will help you play with a position and a counterpoint
green: rule of thirds, the points together are used to adjust the points of attention
purple: pyramidal composition, it serves both to demonstrate superiority with the one that points upwards and inferiority with the one that points downwards, the points together are also useful as points of attention
yellow: golden ratio, I don't know how you use it, however it is quite useful to mark a reference point and as a base guide to adjust the elements of the drawing towards a point of attention