The Ahnentafel report is a simple, non-graphical way of presenting your family tree to view your ancestors.
In the Ahnentafel report, each person is assigned a number. By looking at a number you can determine the relationship of any person in the report. You are always 1, your father 2, your mother 3, paternal grandfather 4, paternal grandmother 5, maternal grandfather 6, maternal grandmother 7, patrilineal great grandfather 8, and so on.
Each new generation has double the number of ancestors of the previous generation. Thus you have four grandparents, eight great-grandparents, 16 great-great-grandparents and so on.
To paraphrase an interesting article about Ahnentafel reports, knowing the numbers allows you to use maths to properly identify any individual. Even numbers are males and odd numbers are females, except for the first person who is always 1 whether male or female. Individual 33 is the wife of 32, or to put it in English your great-great-great grandparents, or to put it in ahnentafel language your father's father's father's father's father and your father's father's father's father's mother. Half 32 and get 16 who is your great-great grandfather. Add one and get 17 who is your great-great-grandmother; half 16 to 8 and you have your great-grandfather, and add one to get 9 who is your great-grandmother.
You can choose to optionally display hyperlinks in the Family Report by choosing the Report tab in the Preferences panel (choose the Genealogy Pro⇒Preferences ... menu item to open the Preferences panel. Clicking on a link will result in the person being displayed in the Family Browser.