Why can’t i add a watermark to my word document?

You can’t add a custom watermark to a protected document – you have to unprotect it first.

Best answer for this question, how do I turn on watermark in Word? On the Design tab, select Watermark > Custom Watermark. Choose Picture Watermark and select a picture, or choose Text watermark and type your watermark text in the Text box. Click OK.

Amazingly, why is watermark not showing up? It is possible that your text is in a shape or a table that has a white background that blocks the watermark. Watermarks are images that are in the header. The header acts like a base layer for your text. If there is something in the text layer that blocks it, you will not see it.