I. Problem description:
After some PDF files are opened, you cannot add comments, notes, bookmarks, etc. A line of text in the toolbar is "you are viewing this document in PDF/A mode ". PDF/A is a type of PDF format,
It is designed to save files for a long time. Basically, some unsuitable functions, such as JavaScript, audio, and video, are blocked. PDF/A is the ISO standard for PDF. You have scanned
PDF documents comply with the specifications of PDF/. You can specify when and whether to use this view mode to view the document.
Ii. solution:
You can solve the preceding problem by unreading the document in PDF/A mode. The procedure is as follows:
1. Select "edit" --> "Preferences" (Windows) or "acrobat"> "Preferences" (Mac OS ).
2. Under "type", select "document ".
3. In "view document in PDF/A mode", select "never", "always", or "only for PDF/a document ". Select "never! You can switch to the PDF/a viewing mode by changing the preference settings again.
Iii. Notes:
1. The above method is only used to solve the problem that Adobe Acrobat Pro cannot edit due to viewing PDF/A documents in PDF/A mode by default;
2. If "File Name (encrypted)" is displayed after the file name is opened, the method provided by "cracking the PDF File Password (tested)" is used.
A. Introduction
Software name: Adult PDF password recovery
Function: the PDF password cracking tool can be used to easily remove user password restrictions, such as setting user passwords that cannot be edited or changed, printing, copying text or images, and adding comments, the decryption speed is extremely fast.
B,
Click to download
C. Notes
Cannot be used for illegal purposes!
Solution for failure to add comments, notes, bookmarks, and other functions to PDF files (tested)
