public static void CustomVariables(Rect fullArea, Rect leftArea, Rect mainArea)
        {
            var list = Rm_RPGHandler.Instance.DefinedVariables.Vars;

            GUI.Box(leftArea, "", "backgroundBox");
            GUI.Box(mainArea, "", "backgroundBoxMain");

            GUILayout.BeginArea(PadRect(leftArea, 0, 0));
            RPGMakerGUI.ListArea(list, ref selectedInfo, Rm_ListAreaType.CustomVaraibles, false, false);
            GUILayout.EndArea();

            GUILayout.BeginArea(mainArea);
            RPGMakerGUI.Title("Defined Variables");
            if (selectedInfo != null)
            {
                selectedInfo.Name = RPGMakerGUI.TextField("Name: ", selectedInfo.Name);
                var prevSelIndex = selectedInfo.VariableType;

                selectedInfo.VariableType = (Rmh_CustomVariableType)RPGMakerGUI.EnumPopup("Type:", selectedInfo.VariableType);

                if (prevSelIndex != selectedInfo.VariableType)
                {
                    GUI.FocusControl("");
                }

                switch (selectedInfo.VariableType)
                {
                case Rmh_CustomVariableType.Float:
                    selectedInfo.FloatValue = RPGMakerGUI.FloatField("Default Value:", selectedInfo.FloatValue);
                    break;

                case Rmh_CustomVariableType.Int:
                    selectedInfo.IntValue = RPGMakerGUI.IntField("Default Value:", selectedInfo.IntValue);
                    break;

                case Rmh_CustomVariableType.String:
                    selectedInfo.StringValue = RPGMakerGUI.TextField("Default Value:", selectedInfo.StringValue);
                    break;

                case Rmh_CustomVariableType.Bool:
                    selectedBooleanResult  = selectedInfo.BoolValue ? 0 : 1;
                    selectedBooleanResult  = RPGMakerGUI.Popup("Default Value:", selectedBooleanResult, new[] { "True", "False" });
                    selectedInfo.BoolValue = selectedBooleanResult == 0;
                    break;

                default:
                    throw new ArgumentOutOfRangeException();
                }
            }
            else
            {
                RPGMakerGUI.Title("Add or select a new field to customise credits.");
            }
            GUILayout.EndArea();
        }