Source

Popovers stem off of action buttons that act as a source to open up transient content.

Animation

When displaying a popover, it should animate from its source to reinforce the connection between popover and source. It should fade in and slide with subtle motion from the source.

Dismissing a popover

A popover can be dismissed by clicking or tapping anywhere outside it, including the source, or by selecting an option or taking an action inside the popover.