Calculated Pens are added through the Edit Page Dialog. The Edit Page dialog can be accessed after selecting a local page and clicking on Edit Page toolbar or menu item.
A Calculated pen is created and added to the selected page when the Add Calculated Trend Pen button is clicked.
After the calculated trend pen is added to a page it is selected in the list of pens that belong to the page. The Calculated Pen information displayed includes a name and a script for the selected Calculated Pen.
