A panel of Action Buttons is available to control all of the features of Kaleider TV.  Use the Arrow keys (or Navigation Ring) to select an Action.  The currently selected Action is highlighted in blue, and a description of the Action is shown below the buttons (in this case Do Effect ).  Click OK to perform that Action.  By default, the Action Buttons panel is transparent.  Appearance Options can be used to make the background solid if you prefer.
Kaleider TV Screen