In individual interfaces, planar polarized behaviors change as the interface rotates. (A and B) Time evolution of the interface contraction/elongation rate and interface angle in two sample interfaces. The color of the markers indicates time (going from blue to red). (A′ and B′) Sample images of interfaces in A and B, color-coded for their measured contraction/elongation rate. (Scale bar = 5 μm) Individual angle as a function of time and rate as a function of time for the sample interfaces is shown in Fig. S2 A. (C) Top row: Cumulative probability distribution of interface orientation angles. Bottom row: Cumulative probability distribution of interfaces rate of length change (i.e., contraction/elongation rates). The graphs show the evolution of a population of initially transverse interfaces over a time window of 10 min. The original population is broken down into three subpopulations of interfaces that either stay within ±15° of their original orientation angle or increase or decrease it by ≥15°. (n = 291 interfaces, k = 6 movies) Graphs showing the reverse evolution of a population of initially vertical interfaces over a time window of 15 min are shown in Fig. S2 B.