Do anybody know, what to do if NevMesh is not visible in viewport?

Here I have NavMesh and after even baking it, you can see in this screen NavMesh isn't visible. But when I run the game, everything just works perfectly, that means the NavMesh is baked! But the problem is it's not visible in the viewport. Do anybody have any idea how to make it visible?
(Like the NavMesh, the camera icon is also not visible in the viewport. Is camera and NavMesh aren't visible for same reason?)

 

U have to enable Gizmos underneath the play button