This is a usability suggestion.

WHY : I often press [Tab] to get information about a segment. But to make the information popup disappear, I need to move the mouse cursor to a blank part of the screen and press [Tab] again - this is very cumbersome! Pressing [Tab] with the mouse cursor in the wrong place just moves the popup to another segment.

SUGGESTION : Pressing [Tab] with the mouse cursor on a segment with an information popup should remove that popup.

This way, I could quickly peek at a segment by pressing [Tab] [Tab]. No need to move the mouse between the tabs.