I recommend not using tape if you can → you can use magnets or books

Engrave using the Leaf settings → for me it took 2 times to go over until it was see-through.

1. Put the leaf on a transparent thing to hold it in place.
2. Add a light source below/above it.
3. Change the leaf position and the light source position until you get the result you want.

*When doing this, it take your eyes a second to see the image because it's in the blank space, so watch it for a few seconds to see the result.