Some keyboards miss context menu key. To bind right alt as context menu:
xmodmap -e "keycode 108 = Menu"
Given commend will have effect until x.org restart. After test that proves that by pushing right alt context menu called, settings should be persisted.
xmodmap -pke > ~/.Xmodmap
.Xmodmap file or rewrite it with current keys configuration.
Than one should make sure that
~/.Xmodmap included in
~/.xinitrc. Here is example from Manjaro:
usermodmap=$HOME/.Xmodmap if [ -f "$usermodmap" ]; then xmodmap "$usermodmap" fi
If other than right alt button needed, one should call
xev | grep keycode
and press needed button. For example here is output for pressed spacebar:
state 0x10, keycode 65 (keysym 0x20, space), same_screen YES,