Create offset surface

1. On the ribbon, click 3D Model tab Surface panel Thicken/Offset .
2. In Select mode, the default is Face. It specifies that only individual faces can be selected with each click. Use Quilt to select a group of connected faces with one click.
3. In Output, click Surface.
4. On the More tab,
   • Select Create Vertical Surfaces to create offset surfaces with vertical sides joined to the original surface.
   • Select Automatic Face Chain to select tangent continuous faces.
5. Optionally, change how approximate offset solutions are computed.
   • To prevent approximate offsets, clear the Allow approximation checkbox.
   • To specify where to distribute the deviation, select from the drop-down list.
   • To specify the accuracy of the computation, click the appropriate option. If Specify tolerance is selected, enter a tolerance.
6. On the Thicken/Offset tab, choose Select, and then click faces or a quilt to offset.
7. Specify the offset distance. If the surface does not have vertical sides, you can enter zero as the distance.

   If necessary, on the drop-down list, use Measure, Show dimensions, or select a recently used value.

8. Set the direction of the offset, then click OK.
9. If an approximation is used, click OK in the message box to accept the results, or Edit to return to the Thicken/Offset More tab.