A compound element is not actually a view element, but rather a collection of other view elements properly assembled to produce a ready-to-use set.
Any user can create new compounds elements and add them to this panel for his/her own use.
Compound elements included in the standard Ejs distribution include the following:
DrawingFrame. This compound element contains a Frame? with a two-dimensional Drawing Panel? on its center and a simple control Panel? on its bottom. The drawing panel contains a generic Particle drawable which you can link to your model variables. The control panel includes a Play/Pause TwoStateButton?, a Reset Button?, and a (non-assigned) numeric Field? to which a model variable can be linked.
DrawingFrame3D. This compound element is a three-dimensional version of DrawingFrame above. The panel at the center is a DrawingPanel3D? and the particle in it a Particle3D?.
PlottingFrame. This compound element is very similar to DrawingFrame above, but the center panel is a PlottingPanel? (i.e. a drawing panel with axes).