Canon 3.1 Gas Heater User Manual


 
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3 Set the Authority.
Encryption Level
Select the security encryption level. Available encryptions levels are High 128-bit (RC4) and Low 40-
bit (RC4), with the 40-bit (RC4) level providing weaker security than the 128-bit (RC4) level.
Forbid users to Print
Prohibits printing of the PDF file.
Forbid users to Edit
Prohibits page operations (add, insert and replace).
Important
When setting authority, set the Permissions Password to prevent users from canceling security.
4 Click OK to activate security.
Note
Setting or canceling security takes effect regardless of whether the file has been saved.
Canceling Security
When opening a PDF file that has security set, Delete Password is enabled in the Edit menu. To cancel
security, click Delete Password and following the message instructions.
Note
The Permissions Password must be entered if it has been set.
If only the Document Open password has been set, clicking Delete Password displays a confirmation
message to cancel security. Click OK to cancel security.