How to open the PDF file in the win7 system to pop up the number out of bounds

1. It may be that your PDF file is damaged. Either the PDF software is corrupted. You can uninstall the PDF software first and then reload it. Then try to open this PDF file. If the same file still appears, it means that the PDF file is corrupted.
Second, a lot of PDF documents, originally a text version, there are pictures, may be a typesetting problem, turning the page to appear digital cross-border error tips, very annoying. For this type of document can not handle the file size, you can consider Print processing, printing into a picture, pdf will automatically generate a page border, and then optimize processing, can be smaller than the original text version of the document, and there will be no error in the number of cross-border.