In Google Docs, you can add watermark, picture and solid color background to your page. Learn how to insert Background Images in Google Docs.

If you're hoping to change the background color of a cell in a table within Google Docs, here's how to create one first: From the navigation menu, select Insert.

Google Docs is forever adding new features. For example, the ability to insert links and other elements simply by typing the “@” symbol or to add text above or behind an image. And, of course ...

Google Docs has no core feature to add a watermark to your document. In this case, you will have to create a background image with the watermark text and add a transparent layer over it.