Open your Word document and go to Insert > Pictures. Choose the image from your computer or online source. Once inserted, ...

How to Move or Resize a Watermark To adjust a text or picture watermark after inserting it, double-click the Header or Footer area of your document.

If the text box won’t resize in Word or Excel on a Windows 11/10 PC, use the options covered below. Before that, update Microsoft Word or Excel, insert a text box, and check if the problem is gone.