MediaCentral | UX User’s Guide : Working with Closed Captions in MediaCentral | UX : Creating and Editing Closed Captions : Support for Roll-Up Captions

Support for Roll-Up Captions
 
Captions created as roll-ups in SCC files can be imported, displayed, edited, and exported in SCC files. Captions are displayed as single row segments in the Closed Captioning pane, and are displayed in up to three rows in the Media viewer.
If you change the alignment for one segment of a roll-up, the same alignment is applied to all segments.
*Gaps between segments prevent roll-ups from displaying correctly. Use the Close Gap command in the Closed Captioning pane to correct this.