This is especially good for embroideries with lots of little lines - anything delicate!
Hoop the fabric you want to put the pattern on. Make sure the fabric is really taut in the hoop for best results when tracing!
Lay the pattern down, and then place the hooped fabric over it, flat side down.
Hold the hoop down onto the pattern with one hand and trace with the other. Rotate the hoop as needed to make it easier to draw the pattern.
You can stitch with the hoop in this configuration, or you can remove the fabric and reverse it - it all depends on how you embroider!