How to arrange adjust monitor and laptop screens on mac book pro

Just in case if you connect to your monitor or any screens .. your mouse goes some where 

to have correct access to your mouse movement .. and to utilise both the screens effectively you can do like this.

On your mac click on Apple icon on menu -> System settings

Click on Displays on left side

Click on Arrange button

Here you have to move monitor to on top of laptop screen 

So that it will be easy to use mouse movement.

After arrangement it will look like this 

Click on Done button ..