Extend Stair. The option selected determines where the base of the stairs sit. You can either change where they extend to, or specify an explicit height. By default, the deck stairs are inserted at deck level and run down to the terrain.

Down to terrain. Extends the stairs down to the ground.

Down to previous location. Extends the stairs to the floor level of the building location below the current one.

Down to deck location. Extends the stairs down to the floor level of the building location the deck is associated with. You might use this if you have raised your deck above the floor level of the current location and want to extend the stairs down.

Explicit Height. Extends the stairs down a specific distance that you define in the Overall Height edit box.

Overall Height. Available only if Explicit Height is selected in the Extend Stair drop box, this lets you define a fixed height for the stairs.

Max. Riser Height. The maximum distance allowed between individual steps. Note that if your riser height exceeds the width of the member you are using for your riser boards, two or more boards will be inserted for each riser.

Tread Run. The width of each step. The width of a step is measured from the nose of the step to the riser of the next step. Note that if your tread run exceeds the width of the member you are using for your treads, two or more boards will be inserted for each step.

Overall Width. The width of the stairs measured from one end of a step to the other end of the step.