How to enable free text field in dff in context segment for Training supplier?

Summary:

How to enable free text field in dff in context segment for Training supplier?

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Hi all,

I am trying to make a field (free text) in Context segment where upon selecting a value in context segment should result in enablement of another free text field to enter additional details/text. I am not using global segment as it would be available on Training suppliers, instructors and classrooms.

However, it always ask for a value set within context sensitive segment. This means I would always have to select a LOV while capturing these details? Can you please let me know how to enable the above setup for WLF_RESOURCE_DFF?