Genreal information on Primavera p3 , urgent

Dear all

I need help for my quations please,

1-i would like to create UNDO botton , who can i obtain use that property in Primavera Project Planner P3.1
, am read that when you click at begin for opening of any project you must to click on Exclusive botton , but in fact its don’t work ,, so what is the anthor tools ..

2-what is mean by Primavera , i need to define and anaysis the original word..
3-i hope from anyone for member here to send me a true example for samle project and with full detail please..


Thank you all

Enginner : Yousif A.Ayal
Iraq
Basra