Concept and Implementation of a Viewport Command
Original Publication Date: 1988-Oct-01
Included in the Prior Art Database: 2005-Feb-15
In a presentation system in which instructional material is displayed in windows, new material can always be displayed through the application of new windows on the screen. This strategy, however, requires significant storage resources, requires the continual application of new windows, and limits the opportunities for successive display of related materials. A window viewport command can provide substantial relief of storage resources, reduces the number of new window applies, and allows increased flexibility in the progressive disclosure of material contained in windows. The concept of a viewport command is that an existing window can be redisplayed to show any desired rectangular area of the window. That portion of the window outside of the viewported area is not shown on the screen.