Pre-existing elements in the image

Contrary to everything I've thought all my life, a blank sheet of paper is not empty. There are elements in it that, although they are invisible, are waiting for us to add the first stroke on the sheet to show their power. Once you know about its existence, you never look at a blank sheet of paper the same way again.

I guess there are rivers of ink talking about more elements than I'm going to list, I hope I can learn from them in the future, these are the ones I consider most important at the moment.

The existence of these points does not oblige you to use them, but it does mean that the choice not to use them has to have a reason.

Gravity.

Reading direction.

Center of the image.

Strengths.

Format.

Balance.