Go to the me colum when you first open the app
Yum sounds like a good idea
Answer:
On the Design tab, select Watermark.
In the Insert Watermark dialog, select Text and either type your own watermark text or select one, like DRAFT, from the list. Then, customize the watermark by setting the font, layout, size, colors, and orientation. ...
Select OK.
Answer:
I believe it is science, but before you do anything with this answer, research more on it, just in case I'm wrong! :)
Explanation: