Back in 2011, the popular Ubuntu Linux distribution made a major and controversial user-interface (UI) change. It moved from GNOME 3.x to its own GNOME-based UI design: Unity. One of its bigger design changes was to force all in-focus applications to use a single global menu. Things are different now. Marco Trevisan, one of Canonical, Ubuntu’s parent company, senior Unity developers announced that, with today’s HiDPI Retina-style displays, it is time to return to local application menus.