Bind GUI Opens when you press O
You type in box for text any command that would work normally and press button "Save".
Bind 1 Keybind is Numpad 1
Bind 2 Keybind is Numpad 2
Bind 3 Keybind is Numpad 3
Bind 4 Keybind is Numpad 4
Make sure you have cheats enabled (OP)