[header] How to tie a dropper loop [title] Hold two points on the line about 12 inches (30 cm) apart. [step] Use your thumb and index finger to pinch these two points on the line. Choose the knot's location based on where you would like to add additional lures on your fly line. 
[substeps] Although the " loop " of the dropper loop will only end up being 2-3 inches (5-7.5 cm) long, you need much more line than that to tie the entire knot. [title] Bring the points together to form a loop.