I can't edit a pdf document. I get this error:
warning! Since the original font is not availalb,e a substituted font for editing is used. Any changes to the tet of the original font will place the new font dependency upon the document. If I click ok, the keyboard is messed up, A = D etc the document is using font type Arial which is available on the computer.
It is never a good idea to edit pdf files. It is best to edit the original files and regenerate. However, it is possible to change the fonts in a pdf, but when you do that the spacing of the document can change and there is no reflow of the document. Editing a pdf should be left to very minor tweaks.