Once you have signed the honor code, you will be able to create more profiles for your ancestors. Each profile has a "Family tree & tools" tab at the top, so you can see the family tree as it relates to each person from there. Click on your own once you've added parents and grandparents, you'll see your tree. The tools also have a descendency view option, so if you are on, say, 4th ggfather, you can see his descendants for five generations. There are other options too, but those are the two I use most.