I like to preview my documents in CMYK before sending off for commercial print.

Designer Pro X's Show Printer Colours shows CMYK, but using what ICC Profile?
And how do I change the preview profile to be the same as the commercial printers?

I notice, if I export to TIFF as CMYK, the exported file looks exactly the same as the preview file in Pro X.

However, if I export to PDF as CMYK, using the default CMYK Profile (I'm presuming it's the same as the Show Printer Colours profile), the colours are very different.

My goal here it to preview in a particular CMYK Profile, and when I export, either as PDF or TIFF, to get the intended result.

All input welcome!

Seamus