Connect Segments: When checked, the tool will create polygons "joining" each level or segment in the extrusion, creating a traditional ducted solid.
Create Endcap: When checked, the tool will create an "endcap" polygon at the far extent of the extrusion, identical to the polygons being extruded.
Create Layers: When checked, the tool will create "layer" polygons at each segment in the extrusion, identical to the polygons(s) being extruded. Normally, this option would be used with Connect Segments off, to create clones of the selected polygons.
Extrude Last: When checked, with Connect Segments on, the tool will extrude the last segment of each selected polygon.
Segments: Controls the number of segments, or "layers" in the extrusion.
Offsets X, Y, Z: Control how far the extrusion is offset along the axes. Use the ControlChannels to make the offsets non-linear along each axis.
Scale X, Y, Z: Control the scaling of the extrusion polygons along each axis. Use the ControlChannels to make the scale factors non-linear along each axis.
OK: Creates the extrusion polygons and closes the tool.
Cancel: Closes the tool without creating the extrusion polygons.
The Extrude tool also includes a standard Origin Tab, allowing you to set the origin along which the tool extrudes and scales polygons.