How to fold a1 size paper?

To fold A1 size paper, start by positioning the paper landscape or portrait based on your preference. Bring the top edge down to meet the bottom edge, creating a crease in the center. Next, fold the paper again in half, aligning the two shorter edges, which will give you an A2 size. You can continue folding in half to achieve smaller sizes, like A3 or A4, as needed.