The Secondary Stair Deformation command is used to move some points on the stair to move to different arrangements in the stair. Secondary stair deformation points are located on the handrails and the line of travel. The movement of the deformation points on the balustrades only affects the form of the railing. The movement of the points on the line of travel, on the other hand, affects the line of travel and, accordingly, the step widths, stair balancing.
For secondary ladder stair deformation:
Click the Deform Stair icon in the ribbon menu .
...
Click the Cancel Secondary Stair Deformation icon from the Stair Deformations toolbar .
...
Click the ladder stair you want to restore with the left mouse button.
...