There are lots of lists in AX that let you list sales orders from a head perspective. From which you can see the lines. If you want to just list sales lines then there are a couple of lists that you can access. This is sometimes helpful if you want to get to the detail of the lines and investigate things like open lines for a specific product.

Here is a quick overview

AX2012 R3 CU9

Cheers

Lachlan