OrgPlus chart titles, headers and footers all appear on the Master Page. This creates a convenient place to edit headers, footers, page numbers, dates, etc. and have the changes carry through to all pages.
Text boxes are free floating objects as well, and are also placed on the Master Page.
To find the Master Page, please go to View | Master Page
Once you have completed your chart title edits you can return to your chart by selecting View | Normal