Canon iR3245 Manual page 554

If you want to create your own Secure Watermark, select [Create] from the
Watermark Type drop-down list → press [Enter] → enter the text → press
[OK].
You can also select the text which has been registered in Register Characters for Page No./
Watermark in Common Settings from the Additional Functions screen.
If you want to register your newly created Secure Watermark to be selected whenever necessary, press
[Register] → enter the text to be registered.
Select the background pattern and size of the text.
To change the orientation of characters, press [Print Characters Vertically].
To use white letters on a coloured background, press [White Letters on coloured
Background].
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3. Press [Done].
7-86 Embedding Hidden Text in the Background