After creating a sketched stair, you can modify stair boundaries, riser lines, and run lines to shape the stairs as desired.
For example, you can select the run line and drag it to add or remove risers.
To modify a run of stairs
You can modify a stair footprint that you have sketched using one of the drawing tools.
In the following image, the sketch of the landing was modified using the Start-End-Radius Arc drawing tool
Modifying a run of stairs
Finished sketch with landing modified
Also, you can modify the sketched stairs by changing their instance properties on the Properties palette. To access the type properties, click Edit Type on the Properties palette.
Select the stairs, and use the drawing tools to change the footprint. Modify the stair's instance and type parameters to change its properties.
When a landing is included in stairs created by sketching boundary and riser lines, split the boundary lines where they meet the landing so the railing accurately follows the landing and the slope of the stairs.