I'm trying to use the cross-section view with slicing in Z to better see where I may need to manually add or remove supports in areas that are blocked by the model or other supports. When you try to drag the mouse over an area to place a support pillar it doesn't seem to work correctly when cross-section is enabled. Also, if you click on a support to manually remove it it will often delete another pillar in a different area altogether.
I'm using S3D 3.0.1