Next Record and Variable Declaration

Dear all,

I am using CF Report Builder. I have two questions which I hope to get the answers:

Question 1:
Let's say I have 10 records. Now the report's current row is 7 (still printing). How to get / see the 8th record before printing? In Crystal Report, I can use NEXT(field) and PREVIOUS (field) to get next record and previous record respectively.

Question 2:
How to declare and use variables in CF Report Builder? I am not talking about passing parameter in, but to declare a variable in the report.

Thanks in advance
Keiko