I've been thinking about a way to spruce up some of my existing charts. One of the things i like about charts is that you can uses oddments and stash yarn. But what if you like a chart but it doesn't work on the yarn colours you have or you have variegated yarn and your worried about it clashing with the image?
Well now you can add this circle chart. I think it could work great on some of the animal face charts like the pig or the panda. Try it on your chart and see if you like the look.
I would print the circle chart PDF the Instarsia chart you want to add it to, place the circle under your other Instarsia charts, hold charts up to light and trace the circle on. You can also see if you like the added circle before knitting using this trick.