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The dropdown list includes options to limit the tree to only male descendants, or only those with the same surname. These are helpful for doing one-name studies, or seeing where people with the name migrated. The tree will refresh whenever any option is changed.
Under the button are other options that you can choose to include or not include. See more information.
There are two descendant formats -- one as an outline, showing people vertically; and a second showing generations in a left to right format. In the Outline format, clicking the – or + buttons next to each name collapses or expands the branch.
Tip: When viewing more generations than will appear on your screen, use the browser's Zoom function to zoom out (Ctrl + minus in FireFox 3+ and I.E. 7+). This makes everything smaller. Even if you are not able to see the text, but you would still be able to see the colors.
To get a summary and number of descendants of a person, go to "His" or "Her", to "Descendant Counts". This shows the number of people in each generation, and the average birthyear of each generation.
After the Descendant Count runs, it saves back to that person's page something like this below. Clicking each of the icons will show a list of that person's notable descendants, corresponding to the icon.