Why there's no one-click watermark button
Unlike a word processor, Excel has no dedicated watermark feature, so inserting a text image into the header is the most common workaround, and it works reliably across print and PDF export.
Applying the same watermark to every sheet at once
Hold Shift and click multiple sheet tabs to select them together, then insert the image into the header once. It applies to every selected sheet at the same time, instead of repeating the steps sheet by sheet.
Frequently Asked Questions
Does Excel have a diagonal text watermark feature like a word processor?
No β Excel has no dedicated watermark feature the way a word processor does, so turning text into an image and inserting it into the header is the most common workaround.
How do I apply the same watermark to every sheet in the workbook?
Hold Shift and click multiple sheet tabs to select them together first, then insert the image into the header. It will apply to all of the selected sheets at once.