Canon PIXMA MP280 On-Screen Manual - Page 399

Setting Passwords for PDF Files Page 399 of 707 pages Important Up to 32 single-byte alphanumeric characters can be used for the password. Passwords are case sensitive. Select both checkboxes to set both Document Open Password and Permissions Password. You cannot use the same password for both. 3. Click OK. The Confirm Document Open Password or Confirm Permissions Password dialog box opens. Document Open Password Permissions Password 4. Re-enter the password and click OK. The Save as PDF file dialog box returns. Important If you close the Save as PDF file dialog box without clicking Save, the settings in the Password Security -Settings dialog box will be deleted. Passwords are deleted once the file is edited. Reset the passwords when saving edited files. Note If you set the passwords via the PDF Settings dialog box, the PDF Settings dialog box returns. Click OK. The Save as PDF file dialog box returns. 5. Click Save. Files are saved according to the settings.