I have a magnificent set of hand drawn rune cards that I wish to scan into a runic encyclopedia of some sort. Each card is 100mm x 80mm, so I could fit 6 per A4 page to scan them. After a little edit, I have four 240mm x 200mm images that each comprise 6 runes.
Is there a way I can get Paint.NET to divide these images, e.g. "here, divide this .jpg into 6 smaller, equal size ones?