Hi Mark,
We do have support for converting from RTF file to PDF. The way that RTF support is implemented is by rendering rich text to a vector image using the richtextbox control internally and then the vector image gets rendered into the PDF document.
Herewith I have attached a sample
RTFToPDF.zipIt is also available along with the Essential PDF install and you can find it at the following path
C:\Program Files\Syncfusion\Essential Studio\4.4.0.51\Windows\Pdf.Windows\Samples\Grid Model\Drawing Text\DrawRichText
Please let me know if you need any further assistance.
Thank you for your interest in Syncfusion products.
Best Regards,
Bhuvaneswari.