How to edit Order PDF

I learned how to edit Invoice PDF, Shipping PDF, Credit Memo PDF. I was not able to find out where are the files responsabile of Order PDF, the one that downloads when you are in the order View page and press print. Please, if anyone know, help me to find the files which are responsable for Order PDF. I am on Magento CE 1.6.2.

Edit your PDF files in Adobe Acrobat as follows:

Open the PDF file in Adobe Acrobat; Adobe Reader cannot edit PDF files.
Use the TouchUp Object Tool to make edits to an image in the PDF.
Use the TouchUp Text Tool to make changes to the text boxes and formatting.
Click View → Navigation Tabs → Pages to change the order of the PDF's pages.

To change the page order of your PDF, edit it in one of these programs.
Acrobat X Pro
Click the “Save” button in the File menu or press “Ctrl-S” on your keyboard to save the changes you made to the PDF. ...
Click "OK" to reorder the pages.