Some heat transfer vinyl types (aka iron-on vinyl that you can use with cutting machines like a Cricut or Silhouette) can also be used in machine embroidery
It's so convenient that you don't have to pre-cut HTV like you would other applique fabric--just tear after embroidering the border satin stitch.
I just stitched DIME's Wicked Wonder embroidery design to show you how to use HTV in embroidery, so follow along!