Today I’ve pondered thumbnail sketches. The history and value of the miniature pictures. Proponents extol the virtues of thumbnail sketches and I agree a smaller sketch can enhance larger works by solving problems before they happen in the final painting or drawing. A traditional “thumbnail” is so small I find a series of them irritating - like swarming gnats. I have no problem with preliminary sketches if they are actually big enough to see and effectively use - 4” x 6” at the least. I’m just sayin’. If a thumbnail doesn’t work for you make it as big as it needs to be to serve a useful purpose in your artistic endeavors.