Administration > Environment Variables > APTNOPDFLINKS — Disabling Links in PDF Files
  
APTNOPDFLINKS — Disabling Links in PDF Files
By default, links are created in PDF files. When this variable is set to Yes, no hotlinks are created in the document content when publishing to PDF files. Bookmarks for a table of contents and a list of tables are still created.
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This environment variable has no effect on HTML output.