There are several different reasons for needing/wanting to make a position title change. Making a position title change is not used in the context of personnel job assignments – it is used for managing the positions in your organization. Use the Positions section of the main menu to manage these titles.
If you want to just change the title to make it easier to find in a list or to clarify its meaning, then just edit the title itself in the titles list. Click on the Add/Edit Titles button and edit the selected title.
If however, you have multiple positions with the same title and you want to change just one of the positions to have a different title, then edit the position and click on the Change Title button to make the title change there. Remember, if it is a new title, you need to add the title first and then you can proceed with making the change.