The Pen Slice tool uses the same underpinnings as the Pen tool This allows you to leverage the same structured or organic flow for creating a slice plane as you would when creating a polygon with the standard pen tool.
The tool has options for creating "Open" or "Closed" slices. In the default, Closed mode the tool connects the first and last point in the slice profile to create a closed loop.
Self snapping options include World Axis, Straight Line and Right Angles.
