Height Adjustment How to Adjust the Height: Loosen the lock collar, hold the upper part of the cane, press the adjustment button, and extend the cane to your desired height. When adjusting the length with the button, make sure you hear a clear "click" sound. Check that the small metal pin is fully inserted into the hole at your target height, and the surface adjustment button is locked in place. Then tighten the screw below to prevent the adjustment knob from slipping out.