Place a shorter length of leader, say about 12 inches, next to the main leader as shown.
Now make a loop with both lengths making sure they remain together as one. You’re now ready to for the knot.
Pass the the loose ends (furthest from the fly line) through the loop at least two times. Many anglers prefer three or four times.
Moisten the knot and pull ends tight so the knot beds down neatly. Choose the loose end pointing towards the point fly as the dropper.
To make your droppers stick out away from the main leader, take the loose end (pointing away from the fly line) and tuck.
Moisten and gently draw tight. NOTE: This tucked knot suits standard mono and not fluorocarbon.