Edit file File name : 50-mutter-system.xml Content :<?xml version="1.0" encoding="UTF-8" ?> <KeyListEntries schema="org.gnome.desktop.wm.keybindings" group="system" name="System" wm_name="Mutter" package="mutter"> <KeyListEntry name="panel-run-dialog" description="Show the run command prompt"/> <KeyListEntry name="panel-main-menu" description="Show the activities overview"/> </KeyListEntries> Save