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