How can we Hide/remove Header and footer displaying

Hello, thank you so much for all your help so far and I really appreciate your time towards all the active tickets I have submitted.

How can we Hide/remove Header and footer displaying on CART page and CHECKOUT pages? Also in general if we create other sales/landing pages we wish to know how we are able to hide the sites hearder and footer section please? Just for the pages we want to do it on.