Final answer:
Spacing in calligraphy is mainly done by training the eye to see correct spacing. Scribes could adjust spacing between words and letters and even split words between two lines. The training of every scribe included memorizing the proportions of each pen stroke.
Step-by-step explanation:
When writing calligraphy, spacing is mostly done by training your eye to see correct spacing. Scribes could adjust spacing between words and letters, elongate certain letters horizontally, and even split words between two lines. Each line was further divided into a set number of 'interlines' to determine the heights of various parts of individual letters. The training of every scribe included memorizing and producing the proportions of each pen stroke.
Learn more about Spacing in Calligraphy