I received warning message when I tried to edit an old PDF file using Acrobat 9 Pro.
One TouchUp warning message says: "Since the original font is not available, a subsituted font for editing is use. Any changes to the text of the original font will place a new font dependency upon the document."
The other TouchUp warning message says: "The acquired editing font has fewer characters than the font used within the document. Many characters may be unavailable."
What do I have to do to edit my PDF file while heeding the warning messages, and what do the messages mean?