You will receive the stand in its folding position, please hold the outer 2 legs and open the stand, make sure that the opening and closing mechanism is smooth.
unlock the mount by unscrewing the screw on the side anticlockwise, then adjusting the mount into the angel you prefer, making sure you lock the mount by screwing clockwise, and even pressing on the mount to make sure it's steady.
Use any of your rig that has a 1/4" screw to mount on top of the stand, please be careful if you have a heavy camera, make sure it's steady and sturdy before using.