You can choose the search type from Theme Options- Search-Advanced Search Type
Type 1 – has the search button full on the right.
Type 4 – has the search button position after the fields
These Advanced Search types can be customized, they work with or without custom fields.
You can choose how many fields will be included in the form and number of Search fields per row.
The Advanced Search type 1 can set to be closed by default.
Last select what other custom fields you wish to show in advanced search which will appear in widget search, shortcode search and mobile search.