Enable this option is a fairly simple and speed process.

Log into your Blogger dashboard and go to Theme > Customize > Advanced > "Header".

Top padding

value 0px, for Disable

value 1px, for Small

value 2px, for Medium

value 3px, for Large

Bottom padding

value 0px, for Disable

value 1px, for Small

value 2px, for Medium

value 3px, for Large