Detailed explanation of the four major limitations of PDF: How to protect your files?

PDF is one of the commonly used file formats in our work. Sometimes, in order to protect the content or usage rights of the file, we need to impose certain restrictions on PDF files. Through the PDF editor, you can set restriction protection on PDF files. Here are 4 common restriction functions, let’s take a look.

Restriction function one: Forbidden editing

Forbidden editing is one of the most common PDF restriction functions, which is mainly used to prevent others from modifying the file content.

How to set up:

1. Open the PDF file that needs to be restricted through the PDF editor, then click the menu tab [Protect], and then click [Restrict Editing].

2. After the [Restrict Editing] window pops up, set a password in the password field, then select [Prohibit Changes] in the drop-down list of [Change Document], and finally click [OK] to set it up.

Restricted feature 2: Forbid printing

Sometimes you may not want others to print a PDF file, especially if the file contains confidential information. The function of disabling printing can help you control who can print files and increase document security.

How to set up:

Follow the setting method of "Function 1", click [Protect]-[Restrict Editing], then set a password in the [Restrict Editing] window, and select [Prohibit Printing] in the drop-down list of [Print Permission]. Finally click [OK] to set it up.

Restriction function three: prohibit copying content

The prohibit copy function can prevent others from copying text or pictures from PDF.

How to set up:

Follow the setting method of "Function 1", click [Protect]-[Restrict Editing], then set a password in the [Restrict Editing] window, and select [Prohibit Copy] in the drop-down list of [Content Copy]. Finally click [OK] to set it up.

Restriction function four: prohibit opening PDF files

To prevent unauthorized access, you can set an opening password for PDF files. This way, only people who know the password can open the PDF file and view the content.

Setting method:

1. Open the PDF file that needs to be restricted through the PDF editor, then click the menu tab [Protect], and then click [Password Encryption].

2. When the window pops up, enter the password you want to set in the password field, and then click [OK] to set it.

How to cancel the restriction function:

If you no longer need to restrict PDF files, the above 4 restriction functions can be cancelled.

"Function 1, 2, 3", cancel as follows:

First, open the PDF file through the PDF editor, and then click [Remove Security Settings] in the [Protection] list of the menu tab.

After the [Prompt] window pops up, enter the originally set password in the password field, and then click [OK] to cancel the restriction function.

"Function 4" Cancel as follows:

First, open the PDF file through the PDF editor, and then enter the originally set "open password" to open the file.

After opening the PDF file, click [Delete Security Settings] in the [Protection] list of the menu tab. When the prompt window pops up, click [Confirm] to cancel "Open Password".

注:

上記の 4 つの PDF 制限機能はすべてパスワードを設定することで実現されます。パスワードを忘れてしまった場合は、パスワードを覚えておくか、よく保存してください。これらの制限を解除することはできません。

うっかり忘れてしまった場合はどうすればよいですか?この場合、他のツールの助けが必要です。

例:PepsiCo PDF Password Recovery Toolツールには複数の機能モジュールがあり、その中で [制限解除] モジュールは「機能 1、2、および 3」の制限された機能を削除できます。 、ただし「機能 4」はできません。直接削除することもできますが、[パスワードの取得] モジュールを使用して PDF の「開くパスワード」を取得することができます。

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