Does anybody know of some good (relatively inexpensive) photo editing software that allows me to draw straight lines & irregular polygons. I am an engineer and mostly take a photo and what to show where a new pipeline may run or some new beams etc may be. Most of the photo editing software I have been directed to on this forum Acorn, Pixelmater, etc seem to be mainly similar to all other editing software ie pencil, brush, freehand stuff with the occasional straight line but no irregular polygons??