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This means that you didn't use the appropriate channel to post your question.
Please go to the official support page for more info on where to post questions about iText. Note that you will need to improve the quality of your question if you expect an answer. Maybe you are asking something that is impossible with PDF in general. For instance: suppose that the screen shot you took is a screen shot of an existing PDF in which you have to programmatically change the location of page numbers. In that case, you shouldn't expect an answer. Please learn more about the PDF specification and you'll understand why it's impossible.