This tool is ideal for creating a Simple Stair, as its name implies. It is not suitable for creating complex stairs or stairs that link between floors. This stair is available in the standard Landmark workspace, but it is not available in the standard Architect workspace. You can add this to your workspace by customising your workspace; You will find this stair in the Legacy category. One of the cool tricks you can perform at this stair is using the Split tool on it. The stair becomes a solid object, and by double clicking on it you can go back to adjust the original stair.