If a field in your participants text file has the same name as a required column, the Participants activity automatically maps the field to that column. The upload process will subsequently copy the value of that field to that column.

However, your text file might contain information that should be uploaded to a required column, but the field name in the text file is different from the required-column name. In this situation, you use the Required Fields tab to change the default mappings that Participants has defined.

For example, if your text file contains phone numbers in a field called TelNo, you can use the Required Fields tab to map the TelNo field to the PhoneNumber column.

If your participants text file contains other (that is, non-required) fields, the Participant activity will automatically map those to additional columns in the sample table. To change the mapping for those fields, use the Additional Fields tab (see Adding other information to the sample table).