Install lxhotkey-gtk by entering the following commands in the terminal:
sudo apt update sudo apt install lxhotkey-gtk
Description:
LXHotkey keyboard shortcuts configurator (GTK+ GUI plugin)
LXHotkey is an universal application for the Lightweight X11 Desktop Environment (LXDE) which allows view and change global keyboard shortcuts for Window Manager actions, including ones to start applications. . This package contains a GTK+ 2.0 GUI plugin.
Homepage: http://www.lxde.org/
Version: 0.1.0-1build2
Section: universe/x11