There are several ways to create new layers in an image. Here are the most
in the image menu. This brings up a dialog that allows you
to set the basic properties of the new layer; see the New Layer dialog
section for help with it.
in the image menu. This creates a new layer, that is a perfect
copy of the currently active layer, just above the active layer.
When you “cut” or “copy” something, and
then paste it using Ctrl-V or
Edit->Paste, the result is a “floating selection”,
which is a sort of temporary layer.
Before you can do anything else, you either have to anchor
the floating selection to an existing layer, or convert it
into a normal layer. If you do the latter, the new layer
will be sized just large enough to contain the pasted