I do it all the time! I do it from the ShowFaceID toolbar, too!

Once the toolbar is created, right click on it and select Customize.

Locate the AutoSum picture IN the ShowFaceID toolbar and then right click on
it (While in Customize mode) Then you can click the Copy button image.
Copy Button Image is grayed out if you pick off the Standard toolbar,
because it is a combo box. Now switch over to Word and CTRL+V to paste the
Icon into your Word document.

AutoSum = FaceID 226
Plus Sign = FaceID 374