The Navigational Property window you are looking for is actually the Properties window
of Visual Studio. Here
you can find additional information about it.
In addition, following the logic of OpenAccess, in the Visual Designer
each class is separated in three parts:
So the properties under Navigation are called navigational properties
and in order to display the Properties window
for one of them, all you have to do is to select it and press the F4 button.
I hope that helps. Let us know if the described actions do not open the Properties window so that we can troubleshoot any issues that might be there.
the Telerik team
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