Well I have an outline layer and a region layer.
The region for sure sure using the outline, so it would be great if I could select some important point from the outline layer and than copy paste it to the region layer.
How is that possible?
The way to go is another. Let's say we have layer outline(o) and region(r).
You create the polygon in o and after that select it. Now hit CTRL+C for copying. Now switch to r and paste it there with CTRL+V. It should be the same place now. Don't forget to disable the view of polygon from o for sure. Now in r you can use the Split Features from the Advanced Digitizing. Now split the polygon at the place where you need it. Delete the second unwanted polygon after that.