Can you glue embroidery?
Synthetic craft felt works just fine, but if you have nice wool felt you can use that too. Other fabrics are possible, but it must be something that doesn’t ravel. … On the reverse side of the embroidery, run a small line of hot glue along the inside of the inner embroidery hoop and press your fabric down into it.
How do you fasten a thread?
This way of anchoring the thread can be a bit more visible than a knot when the seam is pulled flat, so try to keep this style of tying off slightly in the seam allowance if you can!