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The Stair page of the Properties contains parameters for defining the size of treads and risers.
Base Width: The width of the stairs. You can define this here, or when defining the stair geometry.
Tread depth: The horizontal depth of each step.
Riser height: The vertical height of each step.
Riser count: The number of stairs. You can define this here, or when defining the stair geometry.
Terminate with: Defines what will appear at the top of the stairs.
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