Click to select the watermark (you’ll see colored selection handles around the watermark text when it’s selected).Move your cursor over some of the letters in the watermark until it turns into a 4-way arrow.
Watermarks have always been stored as part of the header in Word, so: Word 2007 document with a stubborn ‘DRAFT’ watermark that won’t budge, despite going to the section and trying to remove it the usual way ( Page Layout tab > Watermark > Remove Watermark).
Here’s one I solved for a work colleague… Problem