GiD allows to create a hierarchical structure of Layers, so as a Layer can contain sub-layers. Let's create a Layer into another one as an example:
- Select (using the left button of the mouse) the 'Layer6'.
- Select the New child option in the right mouse button menu, or click
in the upper part of the Layers and groups window. Automatically, a layer named 'Layer0' should appear, as shown in the following figure:
