domestic flights

I am trying to get a printout of my father's Indigo boarding pass, but I can't seem to see the option for a printout. IM not sure if I am doing something wrong or whether that option is not there anymore.

I am getting a flight from Delhi to Ahmedabad and will be flying with Indigo Airlines. I will have some extra luggage with me which I need to take with me. I know some airlines allow a generous amount of luggage and I need to find out the baggage allowed in Indigo domestic flight? I have a...