Griddify is tiny and fast. It helps you compose custom grid systems, vertical rhythm, and do a bunch of other stuff with guides in photoshop. Watch the short tutorial to learn how it works: Download and Install (Photoshop CC) Download and install ZXPInstaller. It helps you install Griddify and other Adobe extensions easily. Download Griddify, unzip it, and install Griddify-CC.zxp using ZXPInstalle