Jeez. Epic frustration with using these boots last weekend. My forward lean wasn't identical boot to boot. It's near impossible to see what's going on with it when you go from walk mode to ride mode. Maybe I should carry around a protractor to measure my boot lean (grin).
So, I put the boots up on my board on the bench today and played with the lever, and moving it between the settings. As their web-page says, there are 4 positions. The lever evidently has some pin that engages one of the the holes in the track, that locks the boot into position. To go between lean positions, you have to pull down on the lever, lean the boot to a different angle, then let the lever go, and adjust the lean until the lever clicks into position. Most unfriendly really, but it's what we have got. Just glad I finally figured it out after 4 years of riding them. It would be super nice if the walk-mode was a different button, so you didn't have to find the correct lean mode setting each time you go back into ride mode.