The third tab of the editor dialog is the Cheat Sheet. This is a very powerful tab, as it automatically generates code for you based on the project configuration. This tab analyzes the project and determines what functions are available from each control. The ControlCommand() script function is how you programmatically set parameters between ARC Controls. The Cheat Sheet tab will display all available ControlCommand() parameters for all controls in your project. Clicking on a ControlCommand() in the list will be added to your script editor.
Alternatively, you can right-click for a quicker menu list of control commands in the editor.