Cell pointer moves down when hitting Enter

Normally in Excel, when you enter data in a cell, then hit Enter, the cell pointer moves down one cell.
Back in earlier versions of Excel, (Office 2002 I think) one was able to change that behavior.
One could set the pointer to move either up, down, left, right or stay put.
Now I have Office 2007 and I can't figure out how to make the cell pointer stay put.
Does anyone know how to do this in Office 2007?

Thanks.