Need Author as Default Register option

When new user registration time, Reader is default (Reader Check box is enabled/selected). Same like, Author check box also need to enabled default. How to customize this change? All registered user are reader as well as author role need to given. How to change this set up?

See e.g. this thread.

Regards,
Alec Smecher
Public Knowledge Project Team

Thanks for the answer. Its working.