How export a sql server 2008 diagram to PDF filetype?
There is no direct way to transform the standard SQL Server diagram to a PDF or an image file type. Actually there is no simple way to export the diagram from within the tool.

You can, however, save it externally and send it to someone by:


print to a file printer (an .xps file) which is formatted like a pdf and an XPS file viewer exists on any windows machine;
open the diagram and right click somewhere in the middle and you'll have there the option to "Copy diagram to clipboard". From here you paste to MSPaint or another image creator and save to wanted format;


Not very straightforward, but can do the job.