[O] How to add entry in the Agenda view

[Xin Shi]

Hello Experts,

I am using orgmode 7.7 in Emacs 23.3.  

I usually have a dedicated window (frame) for Org Agenda view. I found it would be very convient to be able to add item directly from the Agenda buffer, however, I don't see that command in the manual. (A closer one is the refill, which moves the entry to another category)

Can anyone help? 

Thanks!

Xin