Played around a bit and prototyped a couple of ideas for a share button interaction. I was using Sketch initially, but wasn't super motivated to learn it since I primarily use Illustrator and the capabilities seem to mostly overlap. Ultimately just used HTML since what I was doing was pretty simple. Expanding Share Button: http://codepen.io/blyne/pen/EjpDl Zoom In on Share Button: http://codepen.io/blyne/pen/hiuzB
One interesting thing is that the Zoom In option is fuzzy for me when it's zoomed in, but when I Cmd+Opt+I to inspect it fixes the fuzziness. Guessing this is forcing some sort of rerender.