To Prohibit Unauthorized Copying of Printed Materials
Printing a concealed security watermark on paper (Copy Protect) (Windows)
Copy Protect is a function that prints a text such as "Copy" and "Private" as a concealed text on all pages. When a copy-protected page is copied, the concealed security watermark appears on the entire sheet, thereby indicating that it is an unauthorized copy.
For details, refer to Printing a concealed security watermark ([Copy Protect]).
Printing a concealed security watermark on paper (Copy Protect) (macOS)
Copy Protect is a function that prints a text such as "Copy" and "Private" as a concealed text on all pages. When a copy-protected page is copied, the concealed security watermark appears on the entire sheet, thereby indicating that it is an unauthorized copy.
For details, refer to Adding a concealed security watermark ([Copy Protect]).
Printing stamps on the entire printed page (Stamp Repeat) (Windows)
Stamp Repeat is a function that prints stamps such as "Copy" and "Private" on the entire printed page. A text such as "Copy" or "Private" is printed as a visible stamp in the entire page, preventing an unauthorized copying.
For details, refer to Printing a stamp on the entire page ([Stamp Repeat]).
Printing stamps on the entire printed page (Stamp Repeat) (macOS)
Stamp Repeat is a function that prints stamps such as "Copy" and "Private" on the entire printed page. A text such as "Copy" or "Private" is printed as a visible stamp in the entire page, preventing an unauthorized copying.
For details, refer to Printing a stamp on the entire page ([Stamp Repeat]).
in the upper-right of a page, it turns into 
and is registered as a bookmark.