I put a string bobber stop on the line......I just slide the stop up and down the line based on measurements using your length of reach. Your height is equivalent to distance between your outstretched arms,from fingertip to center of chest half that, elbow to hand....and so on. You can change your depth from deeper to shallow or vice versa with out even giving it much thought...hold the stop knot right at the water line you know what you have under it. I like the Thill brand bright yellow Thill Premium Bobber Stops | Bass Pro Shops: The Best Hunting, Fishing, Camping & Outdoor Gear