So Good ........ thanks Kim

...What great ideas! I actually got a little projector for about 10 euros from AliExpress (I didn't need to go outside to get it) usually used for projecting films against a wall but which I could stick an SD card into and which I attached to the part of a desktop lamp meaning I could determine the size of the image by moving it up or down and focussing it when the image is the right size and then tracing the image that is shone onto the table. I was also at one stage trying to make an etch-a-sketch to enlarge an image but I finally lost my patience when it proved to not work exactly enough.