How to protect PDF files from being viewed or copied by others?


2022-08-04 10:40

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推荐软件:AmindPDF Editor


第一步:在电脑上下载AmindPDF Editor并打开,在首页打开需要加水印的PDF文件;
Step 2: After opening the PDF file, in the editing interface, click the "Add Watermark" button in the submenu bar, and the "Add Watermark" dialog box will pop up;


AmindPDF Editor can add watermarks in two ways, one is text watermark and the other is file watermark.

(1) Add text watermark: Enter the watermark text to be added after the text in the "source" range, such as AmindPDF, and then modify the font, font size and color of the text;
(2) Add text watermark: Click the "Browse" button behind the file, add a file or image watermark, and then modify the number of pages and zoom ratio of the watermark;

Modify the appearance of the watermark:

(1) Rotate the watermark;
(2) Modify the watermark transparency;
(3) The scaling ratio of the watermark relative to the page;
(4) The order of watermark and text: The watermark is placed at the bottom of the text or placed at the bottom of the text.

Modify the position of the watermark: You can adjust the vertical and horizontal positions of the watermark.

Steps to add password-protected PDF files to PDF files:
1. Open the PDF file that needs to be edited in Golden Flash PDF Editor, click the "Protect" button in the main menu bar, and go to the PDF add password and remove password interface;

2. Click the "Add Password" button, and the "Password Protection" dialog box will pop up. In the dialog box, there are three modules:
-Set the document opening password: add the opening password of the file, after adding, you need to enter the password to open the PDF file;


3. 删除PDF文件密码:打开添加密码的PDF文件后,点击“保护”和“删除密码”直接删除密码。


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