Camera problems

My camera doesn’t look down, up, left or right in playmode, i’ve searched on google but i couldn’t find any solution to the problem (that worked).

Error:

UnityException: Input Axis Mouse X is not setup.
 To change the input settings use: Edit -> Project Settings -> Input

Umm, I’m assuming you are VERY New to unity, so I’ll try make this simple;

  1. Click The Edit Tab On The Top Left Of The Screen (It’s right next to file)

  2. Hover Over “Project Settings” Then Click On Input

  3. You’ll Then See Something Like This; 37535-untitled.png

  4. Add One Number Higher On The Size (So in the picture I would make the size 20

  5. And Then Fill Out The Proper Information (Name It “Mouse X” Without the qoutations) And it should work.