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What is Overprinting and how does Surveyor handle it?
PostPosted: 06/28/04 02:19:57 PM Reply with quote
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Overprinting happens when characters occupy the same space in the spooled file. For example when a line is printed that looks like this 'Totals ( )' . Then another line is printed on top of the first line that looks like this ' 400 '. The 400 fits inside of the parens, so the result looks like this 'Totals ( 400)' .But inside of the spooled file the text looks like this 'Totals ( )' /r' 400 '. You never see the '/r' return character, so when you view it in the Spooled file Viewer it looks like this 'Totals ( ) 400 ' . Checking the Filter Overpinting box process these return characters, so everything lines up correctly.

Another situation is when characters are printed exactly on top of each other.

Now if the first line contains the value:
' test ' and is overlaid with the value
' XXX ' We can only show one value, so we have to decide whether to show ' test ' or ' XXX '

When the Filter Overpinting box is checked Surveyor displays what is printed last which is ' XXX ' .

When you display a spooled file on a 5250 screen that contains overprinting in which characters are printed exactly on top of each other, you will get a message that reads 'Overprinting not displayed'. This sometimes may make you wonder what they are not showing you.

Surveyor allows you to see everything in the spooled file. In other words, it displays overprinting. When you check the Filter Overpinting box it attempts to display lines that have printed on top of each other.
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What is Overprinting and how does Surveyor handle it?
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