How to manually set search fields for a doctype?

Hi ,

I am creating a doctype with lot of fields and the search fields in the bottom does not allow me to enter more than 10 fields ( only i could make 10 fields searchable ), so i am planning to do it manually in the doctype folder . Please someone guide me how to do it ? Should i change anything in the json file ?

Yes i figured out , i entered the required search fields in the json file . But my doctype disappeared in the module , if i search for the doctype , it appears and i am able to enter the data , but it is not visible under the module i created . Please help