MetaLocator keyword search can be added to the Search Form just as other fields by clicking "Search Form", Add Field, and choosing Keyword as shown below:
Once added to your search form, further options are available:
Options specific to the keyword search form field include:
Autocomplete: Should the system suggest results as the user types
Autocomplete Suggestion Count: How many suggestions should the system provide.
Keyword Search Fields: The fields that should be included in the keyword search. If this setting is empty, *all* fields are searched.