While I am at it here another feature that would be very useful to support reuse with included event sheet.
It would be great to have a reference object type that can point to object types. This would be like family, but instead would support referring to at most one element. A system action should allow setting the object type.
For example, suppose I have included a Reference "plugin".
In a main sheet one could then set: ReferenceCanvas = Canvas1
In the included event sheet I could then use this in conditions and actions.
Touch isTouching ReferenceCanvas ReferenceCanvas draw circle
In another main sheet I could set ReferenceCanvas=Canvas2, and the include event sheet would also work with Canvas two.
hope I explained that clearly.