Choose PDF/A document output format from the Options|Configuration dialog (f8) then click the Options... button on the 'General' page, or
Choose PDF/A document format from the File|Export dialog (Ctrl E) – see PDF/A document file export then click PDF options...
Click Apply to accept the 'Options' page configuration.
EscapeE 'eE' iconEscapeE resumes displaying the 'General' page or
the Export dialog.
Click to expand/collapse hidden textTo set options for PDF/A export

Blue diamond bullet Notes

Double-byte fonts, such as currency symbols, Chinese characters and box-drawing characters, are rendered as graphics.

Security options enable PDF/A documents to be digitally signed using Certificates but not or encrypted or password protected (unlike PDF documents).