Scaling issue in Unity

Question

I am trying to make a game scene for Unity. However, I can't seem to get rid of this border. Or I can't seem to stretch my background to fit the whole screen. I need this scaling to work for all screen sizes. Here is an image of what is happening.

You can clearly see the blue edging, when I don't want that to be happening. This happens when I test on my Tablet as well. The camera is of size 5, however, when I do some debugging, I notice it gives me positions such as 7.15 when I touch on the screen. How can I scale everything down, I have searched through tons of forums and no one seems to be having this issue.

Answer 1

Are you using UI panel for the background? if so try these step.

1st strech the background Panel to fit the whole canvas size

then change the background panel to stretch in all directions

Then select the canvas object and render mode for screen space camera, assign your camera to it and change the UI scale mode to 'scale with Screen size'