A feedback system is shown : A block in forward path, whose output is limited by L block, F in feedback path.
Move sliders to change values of Input I and Disturbance D and see how Output O changes as a result.
Click on A, L(imit) and F blocks to change their gains, and see how these affect O.
Plots of O vs I and O vs D are shown: When you move sliders, you see where you are on the graph.