Hi George,
Pressing the ‘Fn’ key (labelled ‘Options’) when in the Scenes screen will give you this option (‘Scene Editing Confirmation’), though as @mike C points out, this will not apply to SoftKey scene functions.
The logic being that if there are accidental SoftKey presses, scene functions can simply be unassigned from SoftKeys in any/all scenes.
As a side note, it is the same logic that means SoftKeys circumvent user permissions and scene access. For example, if you wanted to give users access to a single ‘reset/setup’ scene store this outside of their Scene Range, you can just assign a SoftKey to recall it.
Thanks,
Keith.