# Billboard Transition Transition definition is placed inside `` tag in SMIL file ``. - The `xml:id` or `transitionName` is the ID of the transition used later in the playlist - `type` defines the behavior of the transition. Only `billboard` is currently supported - `subtype` visualization of the transition. Only `billboard` is currently supported - `dur` duration of the transition ( How long it will take to transition from one image to another). Specified in seconds, *supports* decimal values ( 0.6s ) - `columnCount` number of columns in the billboard which will be animated - `direction` direction of the animation. Currently supported values are `left` and `right` ```xml ``` ### Default transition SMIL player supports default transition for the whole playlist. It is defined in the `` tag of the SMIL file. The transition will be applied to all images in the playlist that do not have a different transition defined directly. ```xml ``` Value in defaultTransition attribute is the ID of the transition defined in the layout tag. It has to match.