Hi David,
Thanks again for your help.
I can go through all the above described steps, but the only information that ends up on the PDF proof is the information I typed in in step 5.
The spreadsheet seems not to have any effect at all (apart from that I can see the example information in step 3).
Strangely enough, if I click on 'variable data fields' in step 1, it is blank and also the spreadsheet I have the option to download is blank. Later, in step 3 and 5, there are variable data fields. Isn't that a contradiction?