Menu: View→Version history
The Family tree displays each historical version of the model in a tree structure where each version of the model (except for the first version that was added to the tree) is a child with one parent. Each child was created by modifying its parent.
Click a version in the tree to view any notes that you made to describe that version.
Double-click a version in the tree to open that version in Amos.
You can also navigate the tree by using the arrow keys and the Enter key on the keyboard.