Required Step 2 
Create a tangent extension out of a complex 3D contour that cannot be extended in one direction only. The faces will be tangentially extended and trimmed by 2 planes (normal to 2 defined directions respectively).
These directions should point in the directions of the extensions. The directions are represented by arrows.
Create a tangential extension to a specified length.
Specify the minimum distance in both the directions.
Toggle the Offset/Shift button for the best geometrical extension method for the specific face.
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Optional Step 3
If you wish to add a filler face, proceed to Optional Step 3.
Note: The filler face will be applied only to the second direction.
Press OK 
or Apply 
in the Feature
Guide to complete the function.
When completed, the Extension will appear in the Feature Tree as follows:
