A short introductory article by Ralph Griswold on designing with nonlinear grids, in which cell widths and heights follow number sequences rather than being uniform squares. It explains Fibonacci grids, reflected symmetric grids, scaling factor and resolution, and defines five sequences (constant, integer, multi-integer, Fibonacci, prime). The remaining pages are grid plots for combinations of these sequences (C x I, C x M, I x F, P x P, etc.), serving as templates for design work.