Relationship Content Finder Slot

Is it possible to default few contents in active assembly editor in the manual slot? So every time a new content item is created, author of the content should see fixed content items already added in the manual slot by default, and then remove or add based on requirements.

We did a similar thing by allowing, for example, our right-hand slot to be available to a navon, and then used propagation to allow any pages below that level in the navtree to automatically use that navon slot’s contents unless the page had right-hand slot contents of its own.

Works nicely…

I dont know at this point if I really want this. Would you explain how you managed to do it?