The following terms are used in this chapter:
The application image is the data that is normally displayed on the terminal screen (presentation space). Although screen size can vary, the application image usually has a height of 24 lines and a width of 80 columns.
The viewport is the rectangular area on the screen through which you view the window on the presentation space. CA TPX allows you to define both the size of the viewport and the location of the viewport on the screen.
The window on the presentation space is the portion of the application image displayed through the viewport. CA TPX Windows allows you to define the portion of the application image that is displayed in the viewport.
In the other chapters of this guide, the viewport and the portion of the application image displayed through the viewport are considered to be one entity that is referred to as a window.
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