Select a file, then tap [Delete]. The file is deleted. You can select multiple files and delete them simultaneously. Check the file details, then tap [Yes].
Select a file, then tap [Other] - [Register Overlay]. Now you can store a file as an overlay image.
Once registered, you can compose an overlay image on the original during copy or printing from the PC. Also, you can compose an overlay image onto a User Box file during file printing.
You can register up to 100 overlay images.
Tap [Details..], and you will be able to preview the file.