Registration Module

OpenMRS:

Reference Application 2.6:

Question: Is there any easy way to change the patient registration questions on the registration Module? I tried to find the concepts related to, for example, patient gender, but it seems it is hard-coded in the patient registration Module. Is this an accurate understanding? My third and last question, if I want to create new concepts and add them to the registration module, is there any documentations to support this work? Much appreciatedI

Take a look at this: Registration App Configuration - Documentation - OpenMRS Wiki