When you say embroidery function keys what are you talking about? Are you talking about the built in - usb1 usb2?
The designs need to be in emb folder and in a folder - for machine to read it!
Did the horizon link software come with the 15000? Use that to send d signs
If not then you can make a hoop in digitizer
The size of the 15000 hoops and save as a Jef
One if the ladies has v4 and we did that so she could send her designs in the correct size hoop for her 500e
Love the wifi !!!
Kaye in la