When you View Statistics for a specific survey, the results for each question will be shown in detail. When you have a lot of survey submissions, the survey results for a text input field would be very lengthy, as each response will be different. The Text Input Display value specifies how many answers will be shown on the statistics page for a question before you are prompted to "See More..." This makes the size of the statistics/results more manageable. The default for this value is 2.

Once this value is exceeded, you can use the "See More..." link to view the remaining results. The number of responses per page in the popup window for "See More..." is controlled by the Popup Display value.