Edit file File name : 50-gnome-shell-system.xml Content :<?xml version="1.0" encoding="UTF-8" ?> <KeyListEntries schema="org.gnome.shell.keybindings" group="system" name="System" wm_name="GNOME Shell" package="gnome-shell"> <KeyListEntry name="toggle-message-tray" description="Show the notification list"/> <KeyListEntry name="focus-active-notification" description="Focus the active notification"/> <KeyListEntry name="toggle-overview" description="Show the overview"/> <KeyListEntry name="toggle-application-view" description="Show all applications"/> <KeyListEntry name="open-application-menu" description="Open the application menu"/> </KeyListEntries> Save