How do I remove the blue border around my canvas?

Think I posted this in the wrong place, so apologies for a repost.


Basically, everytime I run my game in the game view in Unity, I notice a blue border around the screen. I suppose it has to do something with the canvas I have in my scene, but I'm unsure of how to correct it? Anyone know what's causing it?

 

Managed to fix it. It was an issue with the Ui > Panel component. When you add the panel, you have to choose "none" on the sprite slot. for some reason it creates those borders if you don't