TSpline Nodes Documentation - Second set

doc/distrib/NodeHelpFiles/Autodesk.DesignScript.Geometry.TSpline.TSplineInitialSymmetry.ByAxial.md

@@ -1,5 +1,8 @@
-## ByAxial - Documentation
-This documentation file is auto generated by NodeDocumentationMarkdownGenerator, Version=2.14.0.3986, Culture=neutral, PublicKeyToken=null.
+## In-Depth
+`TSplineInitialSymmetry.ByAxial` defines if the T-Spline geometry has symmetry along a chosen axis (x, y, z). Symmetry can occur on one, two, or all three axes. Once established at the creation of the T-Spline geometry, symmetry influences all subsequent operations and alterations. 
 
-For more information about adding documentation to nodes see https://github.com/DynamoDS/Dynamo/wiki/Create-and-Add-Custom-Documentation-to-Nodes
+In the example below, `TSplineSurface.ByBoxCorners` is used to create a T-Spline surface. Among the inputs of this node, `TSplineInitialSymmetry.ByAxial` is used to define the initial symmetry in the surface. `TSplineTopology.RegularFaces` and `TSplineSurface.ExtrudeFaces` are then used to respectively select and extrude a face of the T-Spline surface. The extrude operation is then mirrored around the symmetry axes defined with the `TSplineInitialSymmetry.ByAxial` node.
 
+## Example File
+
+![Example](./Autodesk.DesignScript.Geometry.TSpline.TSplineInitialSymmetry.ByAxial_img.gif)