What is referred to as a 'roll' in television production?

In television production, a 'roll' specifically refers to a stack of titles or text that moves vertically up the screen. This technique is commonly used for credits, news tickers, or to display information in a way that captures the viewer's attention while still allowing for uninterrupted viewing of the underlying video content.

This movement is significant in conveying information effectively, particularly when a lot of text needs to be displayed simultaneously. By rolling the text up the screen, viewers can keep track of the content without feeling overwhelmed.

While some of the other options involve movement or graphics, they do not align with the specific definition of a 'roll' in production terminology. A title moving left to right would be described as a 'crawl,' a graphic indicating on-screen speakers serves a different purpose related to identification, and transition effects in editing involve changes between different scenes or visuals rather than displaying text.