Adding custom thumbnail previews
There IS a way of creating the picture files (which is what you want - a thumbnail is a small version of a picture file), but not the way you want to do it.  You'll have to use the .pes file to create the embroidery, using an embroidery machine, then take a picture of it.  (There's no way of &quot;creating a thumbnail&quot; from a list of instructions for an embroidery machine.)