Search for a Parameter Value Use the parameter search option to search for a parameter value in a list. Click Search at the bottom of the parameter scroll list to launch the Search dialog. Enter a search string and then choose whether the value you're looking for starts with, ends with, or contains the entered string. You can use percent % and underscore _ as wild cards in your search string: Percent % allows you to match any string of any length, including zero length. Underscore _ allows you to match on a single character. For parameters that support multiple value selections, the Search dialog includes a shuttle interface to select multiple returned values.