Split breaks an existing surface into two new surfaces along a row or column division.
Follow these steps to split a surface:
You must have a surface in the model to use Split.
Use the Surface wizard or select Split surface from the surface toolbar flyout.
Name the first surface for future reference.
Name the second surface for future reference.
Click Pick and select the source surface, or select the surface from the dropdown list box.
Select whether to split the surface along the rows or columns.
Click Pick or enter the XYZ coordinates of the point to split the surface along.
Use the Preview feature to verify the surfaces. Change some settings, such as the row/column option, or pick the split point more carefully.
Click Finish or OK to create the new surfaces.
More about splitting surfaces.