NORMA doesn't have direct PDF support, but the web-viewers at http://ormsolutions.com/tools/orm.aspx and http://ormsolutions.com/tools/ormPrint.aspx display ORM diagrams (but not the relational view) from any browser that can print to PDF. I'd recommend Chrome, which has a built-in 'print to pdf' feature. I've also tried Bullzip's PDF printer, but the results are nowhere near as sharp as the built-in Chrome PDF print. I haven't tried any of the Adobe-native PDF printers.
You'll need Chrome, Firefox or IE10+ to open .orm files locally with the web viewers.
The diagram size can be adjusted with the zoom dropdown on the page, or with the scale query parameter on the page. The default scale is 1.2, so ...orm.aspx?scale=2.4 will make the 100% zoom level on the page twice the normal size.
The ormPrint.aspx is still pretty basic. I don't have any fit-to-page style support or zoom settings for individual diagrams. Zooming individual diagrams is a pain, so I need to dig into HTML5 printing support at some point and figure out how to print wide diagrams (currently truncated, long diagrams go to the next page). This currently prints one diagram per page in the generated PDF.
PS IMO, the SVG is actually clearer than the EMF produced by NORMA. There is an extremely low-level bug (in the native GDI+ libraries, below the .NET libraries) that leaves an uninitialized field in the EMF properties for dashed lines. This results in very large purple or blue blobs if the meta files are pulled into tools that look at this field. Short of figuring out how to identify the garbage data, then scanning and cleaning the EMF on the clipboard, there is nothing I can do about this. Unfortunately, it has been known to cause major problems for some printer drivers and non-MS tools. So, if you're pasting to word, I'd recommend Paste Special for the meta file. If you're targeting anything that supports SVG--which word doesn't--I'd use the web viewers instead.