Currently a long-press on the home button triggers Now on Tap, so this new animation on the on-screen software keys leads us to believe that Now on Tap could be seeing a few changes in Nougat.

Pressing a button appears easy, but the brain needs a probabilistic internal model to control a press. A new theory exposes significant improvements to button design that help gamers and musicians.

Pressing a button appears easy, but the brain needs a probabilistic internal model to control a press. A new theory exposes significant improvements to button design that help gamers and musicians.

Otherwise the animation may proceed automatically, without you clicking a button. Even though you selected "On Click," pressing the space bar or the Enter key will also begin the animation.

It’s a delightful animation that has likely been added as part of the aforementioned move away from public dislike counts to encourage greater usage of the “Like” button.