A DNS record list gives you a reference when a domain changes hosting or a website begins pointing to the wrong place.
Export the current records if your provider offers that option. Otherwise, write down the type, name and value of each record and save a dated screenshot. Group the website and email records separately so it is easier to see which service a proposed change affects.
Compare the intended edits with the saved list. Record the change time and test the website and email independently afterwards. Keep the previous values available in case you need to restore them.