Are there any instructions on the paper about the closing of civil access doors and pipeline well doors? Do you usually look at 7 from left to right and 8 from top to bottom?

If you are asking about the size of the door, there are provisions on the drawings, as shown in the following figure.

If you ask where the door frame is on the wall, it is generally nothing more than the center or the flat wall. Just like you said, see 7 on the left and right and 8 on the top and bottom. I don't know what it means.