I'm using a geospatial pdf writer to export a map that was styled with a PDFPageFormatter. The PDF opens correctly in Adobe reader, but not in a webbrowser (Chrome/Firefox). After removing the layer by flattening the pdf (using an online tool or Ghostscript) opening the PDF in a webbrowser is possible.
Is there a possibility in FME to flatten the PDF, the PDF-writer always demands a layer name... So writing without creating a layer is impossible.