A grid as the starting structure
This tool helps prepare a visual framework for a worksheet, sketch plan, or layout exercise. The initial twelve-column landscape design supports a wide arrangement without fixing what each cell should contain.
Choose the grid density around the intended activity. A sheet for drawing small symbols needs different spacing from a layout that will hold handwritten sentences after printing.
Know which editing happens elsewhere
You can design the guide lines and canvas proportions here, but the page is not a full layout editor. It has no text boxes, draggable objects, or independently resizable columns.
The export is a single image that can serve as a background in another application. Preserve its aspect ratio when resizing and check the final line visibility at the size where the design will actually be viewed.