Putting a temporary note in a format

We want to put the note "DO NOT RELEASE" in big letters across a drawing, so that we can send PDFs to people downstream and ensure they don't use drawing fully until we're ready to release it. Then when we release it we'd like to be able to remove the "DO NOT RELEASE" note. I want to do this at the level of the format so all our drawings start out this way. Just putting a note on the format is no good because you can't edit it or remove it when it shows up on the drawing. If put the note in a table it is possible to do this. Because I wanted the text at an angle the lines of the table are in an awkward place; in fact all I really want to see is the text, not the lines of the table. Is it possible to hide the lines of a table? Or is there another way I can automatically put some text in a format that can be changed later?
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