This is a Pro only feature.
The XSI Export Options dialog box contains options for exporting XSI Files.
Geometry
The Geometry section of the FBX Export Options dialog box is used to identify the geometry that will be exported.
Export only current selection
The Export only current selection only checkbox is used to export the currently selected geometry. The entire SketchUp model is exported when there is no selection. Additionally, the entire model is exported when this checkbox is not checked.
Triangulate all faces
The Triangulate all faces checkbox is used to break the output into triangles instead of multi-sided faces.
Export two-sided faces
The Export two-sided faces checkbox is used to export faces twice, once for the front and once for the back. This option doubles the number of polygons in the resulting XSI file and can slow down rendering. However, this option ensures that your model will appear more like it appears in SketchUp. Both faces will always render, and materials applied to front and back faces are preserved.
Materials
The Materials section of the FBX Export Options dialog box is used to identify how materials will be exported.
Export texture maps
Check the Export texture maps checkbox to export textures with your FBX file.
Scale
The Scale section of the FBX Export Options dialog box is used to identify the scale used in the F BX output.
Swap YX coordinates (Y is up)
Units
The units drop-down list is used to determine the unit size in the FBX output.