Hi, Melissa!
Do you see where it says
Quick Links, just above this thread (right-hand side)? Click on that and you'll get a drop-down menu.
Click on
Edit Options. (This takes you to the "Edit Options" part of your "Control Panel".)
Go to the (2nd) 'box' where it says
Messaging & Notification.
Then look at the 2nd part of that 'box' -
Default Thread Subscription Mode and choose the one you want in the drop-down menu (ie Daily notification).
Hope this is clear and it helps!