Standing on the ground looking at the step is there a horizontial bar that is just above the steps? If so there should be two ears, left and right. Lift up on the ears and the step should slide right out. DO NOT STAND TOO CLOSE, or the step will whack you so hard in the shins you will say bad words!
If when they open you are looking at the bottom of a step ( alumimum not a black no slip surface) then you have a double step as was mentioned above. Opening the double step is easy. Grab the back edge and lift it up, flipping the step into the open position and it should hang from the front edge of the top step.
To Close the bottom step, lift the front edge of the step and if I remember flip it back to where it started, you may have to wiggle some stuff but it should all lay flat like you found it. Once you figure it out it is easy.
WBCCI #5501 AIR # 49
1978 Argosy 28 foot Motorhome
Wise men talk because they have something to say; fools, because they have to say something. -- Plato