You can embed a PDF file into a cell of an Excel worksheet and then use Excel's security features to lock the object. This allows you to take advantage of both technologies.

To insert an image in a cell in Microsoft Excel, click the Insert tab, select the Illustration button, then select Picture. It's so simple!

Q. In Excel, is it possible to insert an image into a cell (i.e., not floating atop the cell)? A. Yes, you can insert an image into an Excel cell as follows. Paste an image into Excel, then resize the ...