Adobe Illustrator 5.5 for the Macintosh can edit PDF files. Is this legal if the PDF files contain typefaces?
Adobe allows editing of these documents, but the typefaces may not be re-embedded into the edited document or saved with a new file unless the typefaces are installed on the computer performing the editing. Currently, Adobe Illustrator is the only program capable of editing PDF files, and this program will not embed typefaces into PDF files if they are not installed on the computer being used.