Parameters are used to control object transformation. That is, they control the position, size, color or rotation of the object. You transform an object by binding one or more of the transformation properties to parameters.

A symbol parameter can have one of the following types:

Changes to the value of the parameter result in changes to the aspect of the objects to which it is bound. For example, the width of the basicprogressbar will expand to the right as the parameter to which it is bound increases. In this way, parameters give intelligence to symbols.