Thanks for your reply to my question.
X-Plane 11 is used as our external visual.
When switching from one runway to another, I have to wait for X-Plane 11 to load new runway, in this moment, there are not any messages or graphic bar shown on X-Plane screen. Sometimes the loading new runway time lasts for a few minutes. In the meantime, I do not know the X-Plane 11 whether working (loading) or not. So it is a good thing for X-Plane 11 to give some messages during loading new scenery, just like FSX and P3D.