How to custom margin/ page padding for certain/ specific pages

Hello,

I am trying to figure out how to make specific pages on my websites have a shorter padding/margins than other pages. I have no idea how to write code. Not sure why Squarespace does not make this an option already and instead only allows us to choose the margins and padding for the entire website, instead of certain pages. 

Any help is appreciated!

Hi,

Which page are you referring to? I think we need to use code to do this