How does PDF cancel security mode? PDF Cancellation Security Mode method

First look I did not set the connection hint in the PDF to open as shown in the following figure

Now let's see the solution together.

1. First we open the PDF file to read, and then click on the Menu "Tools-Options" as shown in the following image.

2, then we found in the option "trust manager"-"Enable safe reading Mode" To cancel the previous check

3, you can access the PDF file in the site.

Okay, here we go. Open the PDF file you'll find that the dialog box will still pop up, but we can just click "Yes" to get into the site, which is to prevent us from accidentally clicking on the malicious URL.