Sable Touys is a creative mode utility mod for working with sub-levels from Sable. It contains a handful of simple to use items, most of which are essentially command shortcuts.
Allows for copying / pasting sub-levels.
An easy way to create sub-levels by selecting two points in the world.
Saves the positions of all selected sub-levels into a photo. The photo can be used to restore their positions later.
A simple item with extra pushing strength. They can be stacked on each other to combine their strengths.
I didn't feel like recording more gifs but there are more items
They all have descriptions in game
Arbitrarily storing sub-levels isn't currently supported in Sable, so the implementation of this idea is a little unstable.