To change the displayed fields for searching specimen click on the button. This opens a form where you can select and deselect the fields you want to be shown for searching specimen. Here you can change the maximal numbers of items that well be shown in the list. If you want certain fields to appear in the query options select of deselect them in the list.
After editing the query options click OK so the new selection will become active for the next query.
The maximal number of items shown in a query result can be set in the form for the query options. The default value is set to 100. have If you need to see more or less results, you may change this value to any number you like (for higher numbers make sure you have fast connection to your database).