Item Initializer in high fidelity forms in forms builder

Sony9

Hi,

I am using Forms Builder6.5 sp2.

Is it possible to have ItemInitializer in high fidelity form?

According to xCP-BestPracticeGuide we can include Item Initializer in high fidelity form.

But I am not able to do that in my high fidelity form.

And we can write custom Initializer for high fidelity form?

Suggest is any configuration need to done.