There are a couple of ways that you can request a sample.
If you have a Kantar team because you do a mix of serviced and self-serve studies you can discuss your sample requirements with them and they can set them up for you so that they're available for you to choose when you set up your self-serve survey.
Otherwise, you would click on 'request sample' in the first set up screen and let us know via the form the sample that you require.
Note that for Link Now we would recommend a sample which covers the overlap between the group that represents 70% of sales in your category and the media target for your content. For Concept eValuate and Pack eValuate we would typically recommend that you talk to category buyers. The exception would be if you're trying to attract consumers who don't already buy into the category in which case non-rejectors would be the recommendation.