Adding custom thumbnail previews I am considering buying a tablet with Android, in order to navigate a particular kind of files. These files have .pes extension, and they are special files for embroidery machines, they contain the &quot;instructions&quot; to create particular images for the machine itself. The aim is to navigate those files using a file explorer app, for the customers of our shop: we would like to give a preview of the images in our catalogue before embroidering them. Obviously, thumbnail previews will be really useful, with no need to open every single image. But I am not able to find a single app which can provide a preview for &quot;special&quot; files, which are not jpeg, png, and similar.
Is there a way to customize or add the type of files for which the thumbnail previews are possible?
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.)