This means that even if a table has 1000 rows you will only see the unique values of the first 500 rows as samples. The 'get samples' function is more to give you a format for the data rather than list all possible values. To move this constructed query to the box where you can actually use it, click the 'add to query' button. The selected items are displayed in yellow on the Main Map Display and are listed in the lower part of the screen in a separate frame. Results can be zoomed into by left clicking on a Record number from the list or identified by clicking on the item on the Main Map Display.
Queries are case sensitive.
Display default is set to 25 results with an option to view more at the end of the list.