Moving layers

Sublayer to Parent layer, can it be done?

In the layer panel, drag and drop any layer to any other one.
Note that you can’t drag a parent layer into its own child(s), which makes sense.

Are you talking about moving the objects on the sublayer to the parent layer, or just moving a sublayer out to become a parent layer? If it’s the second, there are the arrows in the layer panel the left arrow moves a selected sublayer out (up) one level per click…