Topic summary
GNOME Panel

Extracted from the Wikipedia article GNOME.
GNOME Panel
GNOME Panel was a configurable taskbar for GNOME. It formed a core part of the desktop in GNOME 1 and GNOME 2. It was replaced in GNOME 3 by default with GNOME Shell, which only works with the Mutter compositor. GNOME Panel served as Fallback Mode until GNOME 3.8 when Mutter could not be executed. It was replaced with a suite of officially supported GNOME Shell extensions named GNOME Classic. Now it is part of GNOME Flashback, an official session for GNOME 3, which provides a user experience similar to GNOME 2. In GNOME 3, customizing GNOME Panel is done by pressing the Alt key while right-clicking on the panel.