All three physical buttons, at that. My work laptop has a trackpoint and the right/left click buttons, but it's missing the middle button that lets you scroll w

All three physical buttons, at that. My work laptop has a trackpoint and the right/left click buttons, but it's missing the middle button that lets you scroll with the trackpoint. The same button works as a middle-click for pasting the second text buffer in Linux, which is nice to be able to rely on when transitioning between terminal and web windows.