Review previous year returns while processing current year return
How can I view the 2007 return for a client when in ProSeries 2008
How can I view the 2007 return for a client when in ProSeries 2008

What I do is keep the 2007 program open at the same time so I can always switch to last year and view it as necessary.
Dusty

You can have ProSeries 2007 and 2008 open simultaneously. I work with a two-monitor setup, and when I'm preparing a return, I have the current year return open on one screen, and the prior year on the other.
You can also view your tax history page or two year comparision page to analyze the two years