DNS Zone Editor :

1. You can update ‘A’ , ‘CNAME’ , ‘ MX’ Records for your Domain.
    a)  Click on DNS Zone Editor

2.) Click on ‘A’ Record and you can update and SAVE it.

3.) Click on ‘MX’ Records and you can update and SAVE it in the same way as above.
4.) Click on ‘CNAME’ Records and you can update and SAVE it in the same way as above.