If you have Adobe Acrobat, you can edit .pdfs.
There are a few 'free' .pdf writers out there that should allow you to edit a .pdf.
Also, if you have Acrobat, there is a program called "PitStop Professional" that is a plug-in to Acrobat.
You can download a 30 day trial and use it with no limitations.
It just stops working after 30 days if you don't give up the $$$.
I use it at work every day. Fantastic program!
G21 Gen2; G19 Gen3; G30SF; G23 Gen3; G26 Gen4. GLOCK Certified Armorer
"Live Free. Practice democracy. Make a difference. Love your family and your country." H.N.K. (My Dad) 09/02/1924 - 05/11/2012