Merge pull request #10580 from mendix/nc-split-3d-viewer

Restructure 3D Viewer

Author: NicoletaComan

content/en/docs/partners/siemens/3d-viewer/3d-viewer-api.md

@@ -18,7 +18,7 @@ For details, see [3D Viewer API Reference](https://d102io3ppw18a6.cloudfront.net
 
 If you want to get properties of a selected part on the 3D Viewer, perform the following steps:
 
-1. Retrieve selected object information as a string through the [On Selection Change](/partners/siemens/3d-viewer/#on-selection-change) event attribute of the 3D Viewer.
+1. Retrieve selected object information as a string through the [On Selection Change](/partners/siemens/3d-viewer/usage/#on-selection-change) event attribute of the 3D Viewer.
 2. Use [`mx.viewer3D.getObjects()`](http://3dviewer-apidoc.s3-website.eu-central-1.amazonaws.com/index/v2.1/apidoc/3dviewer.mx.viewer3d.getobjects.html#mx-viewer3d-getobjects-function) to get the object instances.
 3. Use [`IPart.getProperties()`](http://3dviewer-apidoc.s3-website.eu-central-1.amazonaws.com/index/v2.1/apidoc/3dviewer.ipart.getproperties.html) to pass the selected object as a parameter. Then you get the properties in key-value pairs. The following is the sample code in a JavaScript action. It takes 2 parameters `selectedObject` and `propertyObject`.