All Locators use the same options dialog. These settings let you determine how the results selection is handled. Select the Options button on the Locator Tool user interface.
Auto Zoom to Results: Automatically zooms to the found set of features. If the user clicks the Stop button before the search is complete, the Auto Zoom does NOT zoom to the found set.
Auto Add to Selection: Automatically selects the found set on the map and appends it to the Selection tab of the Attribute Viewer. If the user clicks the Stop button before the search is complete, the found set is selected. This field is disabled if the layer you're searching is not selectable or is a table.
Use Case Sensitive Search: If this box is checked, the Locator Tool selects only those features that match the same case of the characters displayed in the attribute field. The box is unchecked by default. This option applies when using the Attribute Query or Object Query locators with an Oracle or File geodatabase.
Locate Threshold: Use this value to limit the number of features that can be returned. This can improve performance when performing a locate that returns a tremendous number of features. The default value is 50,000.