Add a letter head draft to pdfToolbox, so that any letter may then be combined with the letter head in order to being sent as PDF file.
Letter.odt is converted into a PDF file
Open pdfToolbox "Document"
Select "Letter head"
Letter head options are displayed
There are two letter heads provided with the program
Click on "Show folder" in order to add your letter head to the program
The folder with the two letter head PDFs is opened
Open the folder where the demo letter head is stored
Copy the demo letter head ("callas_letter_head.pdf") into the folder with pdfToolbox letter heads
Leave the "Letter head" action field and go one level above
Enter again into the "Letter head" action
The added letter head is now available in the program
Select the new letter head and execute the action
The letter head is added to the letter text and may now be sent as PDF file