Quick PSA. Here’s how to shorten your mini-blind cord in 4 easy steps. 1) drop the blinds all the way and grab the bell. 2) pull the bell up the line until you’ve reached the desired length. 3) double the line and loop it, tying a knot to keep the bell from coming off. 4) cut the excess line. That’s it. It only takes a few minutes, and less after you’ve done it a couple times.