Where do you find the things you need?
As in past semesters, you will register, add, and drop classes at your designated registration times on Student Planning, which you can get to from the link under "Tools & Apps" on the lower left-hand side of the portal, or by going directly to https://selfservice.barnard.edu.
Registration Times & Holds
To see all your upcoming times and (bonus!) any holds preventing your registration, log into the portal, hover your mouse over Academics, then hover over Planning Your Courses, then click Registration Appointment & Holds. Also, when you log into Student Planning, you'll see just your next registration time when you log into Student Planning (unless you log in during that reg time, in which case you will see no time listed).
You can track your progress in completing graduation requirements via the Degree Audit found in WebAdvisor. Just click on WebAdvisor in the Tools & Apps menu. You'll need to log in again and will then be able to click on Degree Audit.
Pro Tip: don't use Safari! It won't work!
Declare your major, change your degree audit, drop a class after the registration deadline, etc:
The many student forms that used to be on paper or in a variety of different electronic locations and platforms are now almost all aggregated in Slate. You can get to Slate from the portal by hovering your mouse over Academics in the upper left corner and then clicking on Academic Forms. You can also get to it directly via the URL you'll see once you do that. Slateis also where you can log in to track the progress of any forms you have submitted (received, approved, processed, etc.).
Don't worry too much about which site you're on
Once you log into the portal, clicking on various links will take you seamlessly (ideally...) from one site to another to do all the things that can be done online with respect to your student record. As long as you're logged in and can find what you need, it doesn't matter if you're in the portal, WebAdvisor, Slate, or Student Planning.
Pro Tip: A lot of what you want will be found by hovering your mouse over Academics on the upper left and then hovering and/or clicking on the sub-menus that appear.