Blank means an empty background
The generator creates guide lines on a white canvas. There is no placeholder photograph to remove, so the output is ready for handwritten work or for use as an image background elsewhere.
The initial twelve rows and eight columns are a starting arrangement, not an A4 measurement standard. Change them according to what you need to draw or write in each space.
Use the preview to catch sizing mistakes
Choose paper before fine-tuning the counts, because changing its ratio changes cell proportions. Square cells require the canvas ratio and column-to-row ratio to match, not simply equal counts on every paper shape.
The downloaded file is a 2400-pixel-wide PNG. It does not control a printer’s margins or scaling. For a measured exercise, print at your intended size and verify the horizontal and vertical intervals with a ruler.