There are a few different ways that you can protect a graphic in Excel. The first way is to save the file as a PDF. This will prevent anyone from being able to edit the file, and will also keep the formatting of the file intact. You can also password protect the file, which will prevent anyone from opening it without the password. Another way to protect a graphic in Excel is to embed it into a worksheet. This will make it so that the graphic cannot be edited or deleted. You can also use watermarks to protect a graphic in Excel. Watermarks are images that are placed over top of another image, and they cannot be removed without destroying the underlying image.