This is the tracing tool I love to use. It disappears with the heat of an iron so after my embroidery in finished I simply press and any visible lines are all gone.
Pilot FriXion pen and freezer paper sheets are my GO TO when it comes to tracing embroidery designs!
Some folks do not like to use this pen because the lines may reappear if the item gets cold enough (freezer cold). I have never had an issue with this though.