How can I add Indian Rupee code and the symbol? And then to set  Indian Rupee as default ?  and delete all other currencies

Paypal Accepts Indian Rupee - Currency code INR 

and where to update paypal email address?

Through studio/developer/data items/payments/currencies  added INR with html code  ₹ for indian rupee symbol

instead of 6 currencies now able to see 7 currencies

how to make indian rupee to default?

in settings / general  there are only two currencies

please guide me how to  ?