Print to PDF

I am unable to print to PDF. In the Print Window, I select Bluebeam Printer, define my print area and then click OK. Then I get the window to name the file but the Save As Type option is only *plt and not *pdf. I cannot save to *pdf file extension. I try using the other printer configuration like DWG to PDF.pc3 but it still wants to save as *plt instead of *pdf. What can I do?