In User Scrolling, the screen manager performs no actions to support scrolling. All commands entered are passed to the procedure step. In addition, no command translation is performed, either on input or output, to common scroll actions. The user application procedure step is responsible for all actions and behaviors.
When the Scroll check box is not selected, the software suppresses the placement of scroll position, scroll amount, or the scroll indicator special fields.
In Mode 3, no viewport adjustment is performed. Instead, the command and the special fields are available to the user procedure step to make scrolling decisions. After this logic completes, the assigned values of the scroll viewport, scroll amount, scroll position, and scroll indicator are used to display the next screen.
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