What's problem you are encountering?
When did this block get added, and what does it do? What have you tried that didn't work?
I tried using it, but it doesn't seem to do anything... Post a project example, link, or screenshot:
Im just on mobile at moment but if you place a sprite over another one, it will cut the shape of the first sprite from the second one e.. make it transparent.
Here is the thread with my feature request: Enhanced "paste on" block .
And another thread where we discuss my initial task: to have an instrument able to make parts of a sprite transparent: Paste a Sprite on another Sprite
So the CUT FROM block is a best and fastest way to cut off parts of the sprite using another sprite as a stencil.
I've asked for more, but Jens decided to add just that