Unity terrain is blue in scene window

I made a unity project in 2020.3.30f1 with the template Third Person.

When I added a terrain, it was instantly blue. When ever I raise the terrain, I can not see if it raised or lowered unless I move my mouse to the side of it where it will be slanted, showing it was raised. It is only blue in the scene window, and works in the game window.

The first picture is of the scene window, and the second is an example of me figuring out that the terrain was raised.

Anyone who can help, please let me know what to do. Thanks!