Can you please tell me how to add more options in home page search by using custom feild
I have seen a WordPress theme where we can add option in search by using custom field it have option to add it in search or not can you please tell me how i can do it

Custom fields are category related so they will show-up on search page only.

Then how should i add option in search bar

But if they are for category then what .we still can ad use them as filter i think because my all category have same custom feild

Nice idea, but you will have to manually add it here.

Yes of course but can you please help me how to manually ad it