When using a handsaw to cut plywood, which side should be facing up?

When cutting plywood with a handsaw, it is recommended to have the finished (or good) side facing up. This is because when sawing, the teeth of the blade typically tear the wood fibers as they cut. By positioning the finished side of the plywood up, you minimize the visible tear-out on that side, resulting in a cleaner, more aesthetically pleasing edge.

Having the finished side up allows the saw blade to cut away from the surface that will be exposed, which helps retain a smooth appearance. Conversely, if the rough side were facing up, the chance of unsightly splintering and tear-out on the finished side increases, which is often undesirable in woodworking projects. This principle is particularly important in finishing tasks, where aesthetics are a priority.