On April 7th, Google launched a new version of Gmail for mobile for iPhone and Android-powered devices. We shared the behind-the-scenes story through this blog and decided to share more of what we’ve learned in a brief series of follow-up blog posts. This week, I’ll talk about different ways to animate the floaty bar.

Even from the earliest brainstorming days for our new version of Gmail for iPhone and Android-powered devices, we knew we wanted to try something novel with menu actions: a…