As already mentioned in the section My Search Forms, you can use the form generator to create your own search form and include it in the header of your website, as an example. You only need to perform the following steps:
keywordsname. If you prefer, you can make this field mandatory, because a search without a search term will probably not yield many results.
query_typewith the option values
This will create a working search form, and you can embed it as a frontend module in the page layout in the header or any other column of your website.