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For example, if the following window was displayed on a workstation screen panel:
| Panel |
|---|
................................... |
| No Format |
|
........................... : : : : : : : WINDOW ONE : : : : : :
.................: |
And then you overlay another window like this:
| Panel |
|---|
......................................... |
| No Format |
| ..................... : : : WINDOW TWO :
........................: : .....................................: |
Then the actual resulting display will look like this:
| Panel |
|---|
......................................... |
| No Format |
| ..................... : : : WINDOW TWO : : : : : : : :
.......: : ........................: |
The top border of window 1 has disappeared from the display, because window 2 erased its attribute byte from the screen panel.
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