Teaching notes on how to set up a baseline grid in InDesign. This document is a slightly revised and reformatted document previously available here.
A baseline grid is based on the leading of the continuous text (body text) of a publication. Leadings and paragraph spaces of all text in a complex publication would then be mathematically derived from this leading. A baseline grid ensures that the sizes and leadings all text in a complex publication are related to each other and are locked into place, so that they line up across columns as well as across pages. Baseline grids are almost always used in newspapers, and often in other complex publications such as magazines and textbooks.