press space to add a x-intercept at the mouse Press p to remove all x itercepts Hold Z to snap the x intercept to grid press the flag to reset position and zoom click and drag the grey dot to change the hight click and drag the blue dot to change the slope Press the left and right arrow keys to change the width use the scroll wheel to zoom in/out click and drag the background to move the camera Press the "-" key to flip the parabola by making it negative Press "R" to toggle automatic slope rotation
