Metamorphosis in Type Design

Variable font design is a biological process by which a typeface physically develops after birth or hatching, involving a conspicuous and relatively abrupt change in the structure of the glyphs through cell growth and differentiation. Some historical styles can undergo metamorphosis, which is often accompanied by a change of nutrition source or behavior. Glyphs that go through metamorphosis are called variable. Typefaces can be divided into styles that undergo complete metamorphosis, incomplete metamorphosis, or no metamorphosis.