Upcoming select tool feature request:

[SnailPerson]

Id love to see the functionality to separate a selection into a new layer.
Say you have one layer with two objects, but you want both on separate layers.

In current Klei you have to duplicate the layer, delete object A on the first layer and object B on the second to have them each on their own individual layer.

With the select tool, all you'd need to do is to select/outline the object you want to "extract" and hit some button / keybind and boom, you got your selection deleted from the previous layer and pasted on a new one.

Alternatively, this could be split up to multiple steps so there's no extra code involved:
select -> press ctrl+c -> press backspace to delete what's below the selection -> ctrl+v on a new layer.