To simplify the management of many of the player features, Kaltura has implemented the “UIVars” to override and configure player features. Kaltura UIVars are an incredibly powerful feature of the Kaltura Players which allows publishers to pre-set or override the value of any FlasVar (object level parameters), show, hide and disable existing UI element, add new plugins and UI elements to an existing player and modify attributes of all the player elements. This guide will take you through using the Additional parameters and plugins section to customize player features that are not "out of the box".