Wiktionary
n. The continuous movement of text or images on a display screen in either a horizontal or vertical direction. vb. (present participle of scroll English)
Wikipedia
In computer displays, filmmaking, television production, and other kinetic displays, scrolling is sliding text, images or video across a monitor or display, vertically or horizontally. "Scrolling", as such, does not change the layout of the text or pictures, but moves ( pans or tilts) the user's view across what is apparently a larger image that is not wholly seen. A common television and movie special effect is to scroll credits, while leaving the background stationary. Scrolling may take place completely without user intervention (as in film credits) or, on an interactive device, be triggered by touchscreen or a keypress and continue without further intervention until a further user action, or be entirely controlled by input devices.
Scrolling may take place in discrete increments (perhaps one or a few lines of text at a time), or continuously (smooth scrolling). Frame rate is the speed at which an entire image is redisplayed. It is related to scrolling in that changes to text and image position can only happen as often as the image can be redisplayed. When frame rate is a limiting factor, one smooth scrolling technique is to blur images during movement that would otherwise appear to "jump".
Usage examples of "scrolling".
Her Prime program produced a brief summary of Teterton, scrolling an indigo script across her vision that detailed a small chemical processing company that supplied local food producers with specialist vitamin and protein concoctions.
Acknowledgments returned sporadically, scrolling across her vision as she dodged traffic and slithered around lumbering pedestrians.
She was looking at the reports scrolling down her membranes rather than at anything in the room.
He expanded the icon and read the script that came scrolling out with a growing sense of dismay.
There are beds, tables, and heavy, dark scrollings done in teak and mahogany, and many of the bedrooms and receiving chambers, the upper study and small parlour, hold a sombre charm.