Use this procedure to change the distances between landings and treads and the stringer resolution of stairs. You can differentiate the size of landing components from those used for the stair flights.
- Open a tool palette that has a stair tool.
- Right-click a stair tool, and click Stair Styles. Note: Alternatively, select a stair in the drawing, and click
. 
- Select the stair style you want to change.
- Click the Landing Extensions tab.
- Specify whether stairs of this style can vary:
If you want to… Then… specify stringer resolution and extension dimensions, such as distance to first tread up and distance to first tread down, when you add or modify stairs select Allow Each Stair to Vary. require that all stairs of this style use the extension dimension settings of the style clear Allow Each Stair to Vary. - Specify extension distances:
If you want to… Then… increase the distance to the first tread on the down side of the landing enter a value for Distance to First Tread DOWN. To extend the landing down by a single tread, select Add Tread Depth. increase the distance to the first tread on the up side of the landing enter a value for Distance to First Tread UP. To extend the landing up by a single tread, select Add Tread Depth. - Select Extend Landings to Merge Flight Stringers with Landing Stringers.
This option extends the landing to merge the flight stringers with the landing stringers.
- Select Extend Landings to Prevent Risers and Treads Sitting Under Landings.
This option is on by default for all stairs from earlier-release drawings. Clear it to allow the creation of flush rectangular landings.
- When landings are placed automatically, their length and location are specified in Landing Length and Landing Location.
If you want to… Then… set the size of automatic landings enter a value for Landing Length. set the placement of automatic landings select Top, Middle, or Bottom for Landing Location. - When you finish changing the properties of the stair style, click OK.