The specific operation steps are as follows:
1. Open the software, and then select Open-Browse to open the PDF document to be edited.
2. Then select Page Organization-Add-Insert Blank Page in the toolbar of the software interface.
3. Then set the blank page size in the pop-up page.
4. Next, set the location to insert the blank page, and then click OK.
5. When finished, you can edit the content directly, and then select File-Save to save the document.