Hi Marty_PA,
You can scan in your signature with any scanner. Write your signature on a blank piece of paper in the upper left hand corner, scan it in, then save the file to a location of your choosing. Amazing Charts will take a .BMP, .JPEG, or a .GIF file. You can also use MS Paint, to capture your signature as well. Once you are satisfied with that, go in to you account and browse to the image. Hope that helps!
-Darryl