A SubBitmap represents a portion of an existing Bitmap resource that can be used as a seperate image. It is a resource that has to be added to an already existing Bitmap.
The name identifying this SubBitmap. The skin's items use this ID to refer to the image associated with that SubBitmap.
This ID has to be unique and is required to be set.
x, y, width and height
These attributes define the position and dimension of the sub-image taken from the parent Bitmap. You can easily set those attributes via the SubBitmap-Editor right to the SubBitmap settings window.
These attributes are essential and have to be set.