Speed zoning
This lets you do manual zoning quickly when you want to process only parts of a page, for instance to select only certain paragraphs and diagrams from an article.
How to do speed zoning
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Make sure the
Select zone tool is active.
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Move the cursor over the page image. Shaded areas will appear one after the other, showing the auto-detected zones.
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Double-click in a shaded area to transform it to a zone.
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Repeat as desired, checking that zone types and boundaries are suitable and modifying them if necessary.
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Send the page to recognition. The zoned areas will be processed, everything else will be ignored.
If the 
the On-the-fly tool is on then the zone is recognized immediately.