How do I extract content from a PDF file?

How can I extract useful content pages from multiple-period PDF magazines and save them separately after processing, then make them into a PDF file?
Use the Foxit PDF Editor Green Chinese version and pdfbinder the PDF Merge tool free version of these two tools, you can finish the task.

1. Delete Page irrelevant content

The first step to do is to talk about the need to collect the magazine pages of irrelevant content deleted.
First download Foxit PDF Editor V2.2.1 build 1102 Green Chinese version, decompression run, use the Open button in its interface to open the PDF document that needs to be processed.
Click the page Number toggle button on the status bar, switch to the PDF file page that you want to extract, double-click on the page, appear the Foxit toolbar, select the Rectangle Marquee tool, drag the unwanted area on the page, and then press the DELETE key on the keyboard to remove the unwanted parts. You can also cut and organize the content that you want for other pages.

2, add the necessary note text
for easy reading, you will also need to add text tags to the PDF page (marking the period, page number, or necessary comments).
Foxit PDF Editor Support Chinese fonts, you need to import Chinese fonts before adding Chinese text content. You can select the Add text object item from the main menu or from the right-click menu. Click the "Object Properties---Import Windows Font" command in the dialog box, and then select the Chinese font you want, and when you're sure, enter the text you want to add in the Add Text Object dialog box, OK.

Tip: If it is a PDF document that is directly converted by word or WPS document, you can easily edit the text in this gadget, just double-click the text to edit it.

3, extract a useful PDF page

Process the page you want to extract, select Export page from the document menu, open the Export Page dialog box, and click the "Purpose" button, Select Set to extract the exported PDF file name and save location. Select the current page item in original page range, and view the current page content in the source Document preview area on the right, and then click the OK button to extract the current page into a separate PDF document.