How to generate isometric and hexagon grid paper for print with accurate spacing

A developer explains how to produce isometric and hexagon graph paper for printing, working in PDF points where one inch equals 72 points. A common error is spacing isometric lines by the triangle side length rather than its height, which distorts the triangles. The fix is to anchor all three line families to a shared lattice point at the page centre and round coordinates to avoid duplicate edges. For hexagon grids, the article clarifies that a tabletop '1 inch' usually means the across-flats width, which implies a side length of about 0.577 inches. Finally, it recommends centring whole cells within the margins so the grid looks balanced.