The frets could be somewhere alongside the neck. Some diagrams are in favor of vertically oriented, rather than horizontally. But they function the same way, just turn it 90 degrees clockwise. So, the answer is fretboard diagrams can be oriented vertically or horizontally.
I think it was priests and nobles because before the printing press was invented they made written copies of the bible.
Answer: balance, rhythm and repetition, emphasis, proportion and scale, and last but not least, harmony.
Explanation:
