I have FlexiPDF Pro 2019. Suppoedly, this version allows me to insert and edit headers and footers. If I go to the on-line user manual, it describes how to do this. I found it by searching on "Headers" and the first search result is for "Formatting."
The path for this as given at the top of the article is Page operations/Numbering/Bates.
When I go into the program, there is no menu selection for "Page operations." If I look at the menu for "Pages," my choices are:
- Insert new
- Insert from document
- Insert from scanner
- Auto crop
- Remove crop