Intensity is the brightness of a color. When a color is not mixed with any black or white it is at full intensity; Also called a pure hue. You can also change the intensity of a color by adding its complimentary color.
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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.