In a list view, any filter applied will only select items from the page you are currently on. If, for example, you are on page 1 of 50 and enter a filter criteria that is present on page 2 of 50, the listing will be empty with no items to display. Making a filter apply to all pages would make it a useful feature, whereas only filtering on one page at a time is not quite so. The filter you can use from the -Choose a Sample Source- window that you reach from a sample window could be a model since it filters on all pages.