It seems auto-complete polygon option does not know how to auto-complete polygon around another polygon of the same layer (namely to form a polygon with a hole that is the boundaries of the older polygons that was within the boundaries of the new polygon).
I know I can use tools like "Erase", but to my knowledge, that will work only for two different layers, which is not the case here. And using a tool like that will require time anyway, while I'm more interested in something automatic like "auto complete polygon"
Any ideas?
