In order to input detailed information about your past cycles into OvuFriend, click on Settings/My Cycles, and mark the beginning and the length of the past cycle you'd like to track. This way, in the Current Cycle view, the program will be able to draw for you an easily-edited graph. If you'd like to introduce changes to a specific cycle, go to the Current Cycle view and, using the arrows you'll find at the side of the graph, go back to the cycle you'd like to edit. Then, click on the graph and insert all of the desired data. OvuFriend will then point out the most likely time of your ovulation, and will use all of the newly introduced data to continue learning about your fertility.