Since pen numbers can contain letters, they don't always sort the way you would expect them to in lists and on reports. Fusion makes it possible for you to define your own sort order when Fusion displays pens in these situations. To do so, just drag and drop the pens into the order you desire to see them. When you are finished, click the Save button. If you change your mind, click the Cancel button.
You can open this window by using the Change Ordering… menu button in the Pen List window. You will then choose the Change Display Order For menu and the location you want to change the order for.