If it is in Free 2D, just do a Save As and change the Save As Type to PDF. Then save to folder and then e-mail.
As far as I know frees2D doesn't support "save as pdf".
However there is an easy solution. Download some freeware such as pdfcreator, this is a pseudo printer.
To create a pdf click print, then chose pdfcreator from the list of available printers, then instead of a hardcopy you get a pdf.
I use this method everday and it works a treat. There are many different freeware packages if you don't like pdfcreator.
It's possible Windows 10 already has a "Microsoft Print to PDF" option when printing. I have it but not sure if it came with Win 10 or Office 365/2016.