How to begin a document numbering with a number other than 1? I'm making a large document in separate docs. I want to number the second doc from 21 on. It will only allow me to start at 1. Any fixes?
On Pages '13 : 


Go on Setup (Top right corner) 
Section thumb
Start at '21' 






On Pages '09 : 


Show inspector 
2nd thumb
Section 
Start at '21'