Multiscreen level creation

Hi!
What's the way to create multiscreen top-down and side scrolling games? As i understand there are no level editor and even tile tools like grid and snap.
Is it possible? How?
I've seen tutorial with platformer template. Is there only way to create huge pre-rendered background and create only collision boxes? It consumes a lot of memory...
What's the way to create multiscreen top-down and side scrolling games? As i understand there are no level editor and even tile tools like grid and snap.
Is it possible? How?
I've seen tutorial with platformer template. Is there only way to create huge pre-rendered background and create only collision boxes? It consumes a lot of memory...