Creating and Customising New DocTypes

[shraddha]

Hi,
Refer,

Unable to create a duplicate of doctype

hello, my problem is that i wanted to create a new module according to my need and wanted to edit certain doc types … but when i try to duplicate a doctype for example delivery note it sows me an error : “No permission to ‘Create’ DocType” please guide me through it

Also Refer Following link for ‘How to customize Doc type’

http://frappe.github.io/erpnext/user/manual/en/customize-erpnext/