To adjust your email and/ or notification settings, open you settings menu at the top right of your screen, and click on the notifications shortcut!
You should then see this page:
Here you can adjust your email and notification settings to your preference. Now it's simply a matter of clicking your desired option. The system saves as you chose so there are no extra steps!
Feel free to navigate away from the page knowing your preferences have saved, and that you're able to change them again whenever you wish.