@mcc the dash is the bar of favourite/running applications that, in stock gnome, only appears in the activities overview, the screen you get when you click activities or press windows/super. https://en.m.wikipedia.org/wiki/GNOME_Shell#Design_components In stock gnome there is nothing like a taskbar or dock on the normal screen. To read between the lines, Ubuntu want their stock system to look like their old Unity UI, which is why they ship a dock extension by default.