Question Canvas Lines showing?

I started messing around with Canvas and TextMeshPro but I noticed there are giant lines in the sky, and they won't go away. How do I get rid of them?

https://imgur.com/a/rqz2IhL

 

That's because you are in scene view mode. Those lines won't appear on your game.
Basically those are the bounds of the canvas that are set on "Overlay", that means that the canvas will Overlay (as the name says) any other object your camera render.

 

Even when I click play it still shows. So that's normal?

 

On the scene view, yes.
I noticed that you may not have your "Game" view active, I strongly recommend you have it active, with that window you can see what the PLAYER will see.

 

This is through the Game view, its still the same

[EDIT]: I just test built the game and it doesn't have the lines.