This means that you can assign background images, sounds and animations to
make the drill/test appropriate for the grade level that you are teaching. These
settings are saved in the current level file. This means that each class can
have its own set of skins in a single Musication program. Here is an example of
the Note Identify drill with three different backgrounds applied to it. The
second image is from the 3d collection of backgrounds. Using Red/Blue Anaglyph
glasses students can view this image in 3d.