Window_Message.prototype.updatePlacement = function() {
this._positionType = $gameMessage.positionType();
this.y = this._positionType * (Graphics.boxHeight - this.height) / 2;
this.x = 190;
this.width = 800;
this.height = messageHeight; // the default is 150.
};
var messageHeight = Number(parameters['Message Text Height']);
var PEZ_Game_Interpreter_pluginCommand = Game_Interpreter.prototype.pluginCommand;
Game_Interpreter.prototype.pluginCommand = function(command, args) {
PEZ_Game_Interpreter_pluginCommand.call(this, command, args);
if(command === "MessageHeight") {
var messageHeight = Number(args[0]);
}
};