It is one of the unfortunate problems with the software - once you leave your score report screen, there doesn't seem to be any way to go back to it. (or if there is a way, I haven't found it). Because of this, it's a very good idea to write down the Quant, Verbal and Total scores as soon as they're displayed. I do wish they'd change the software to fix this issue - there's no reason you should be prevented from revisiting your score screen, and it's obviously a frustrating problem for the many test takers who don't realize that the software behaves this way.