Whether you experiment with letter shapes, handwriting size, or line slant, make sure that your baseline and letterforms are consistent.
不管写什么字体，写得大或小，是否使用斜体，都要使每个字母的大小保持一致。
英语百科
Letterform
A letterform, letter-form or letter form, is a term used especially in typography, paleography, calligraphy and epigraphy to mean a letter's shape. "Letterform" is a synonym for glyph, which is a specific, concrete way of writing an abstract character or grapheme.