View Models / Presentation Models

Question

Would I be correct in saying that View Models / Presentation Models are screen specific and that you would therefore not expect to share them with other screens?

Answer 1

If you define "share" as there is a one to one mapping between a screen and a view/presentation model, then yes, it is screen specific.

However, it doesn't imply that there can be no reusable controls/code exist between different view/presentation models.