The Blender user interface

When you open Blender for the first time, you will see what we call the default user interface. The interface in Blender is flexible to the point where you can stretch and reshape it in any way you want. The following screenshot shows the default user interface for Blender:

One of the core concepts about the interface is that it works with a window system. Each division of the interface is a window that you can resize and change based on context.