Question

What’s the the grid rule for filmmakers called?

Answer 1

The grid rule is nine imaginary sections that represent a frame.

Hope this helps

-AaronWiseIsBae

Answer 2

"The rules of the grid" is what it is called.

This rule states that the screen has a grid that creates something similar to a tic-tac-toe design. It allows the usage of centering a piece, but has no real usage other than that.

hope this helps