This feature was added about mid 2010. At the bottom of the memorial is the info about the person who submitted a memorial and the memorial number.
Go to the parents memorials and get their memorial numbers. Then go to Terry's memorial page. Right under the bio section is the link to family section. Click on this and place those memorial numbers in the correct slots. When you enter this, you will see a link you can click on Terry;s memorial page. Click on it and it will take you to his parents memorial pages. You can go back and add as many generations of grandparents as you can find. It is a wonderful tool.
I hope this helps. There are guidelines within the Contributors tools, that will explain most anything you need to know.