Make Stair from Faces:

Make Stair - Simple

Make Stair - Slab

Make Stair - ZigZag

Make Stair - Steps

Make Stair - Extrude

Make Stair -Treads

Make Stair - Slope

Make Stair - Slope Simple

Make Stair - Slope Solid

Shortcut:

Ctrl (Alt on Mac) + Select Point > Set Heigth Stair

Ctrl (Alt on Mac) + Select Face > Set Landing

Tab > Reverse Direction Stair

Double Click on Screen ( or Right Click) > Set Parameter

Double Click on Face > Set Index,Landing.

Double Click on Face (1 Selected Face)> Change Start Edge

Explode all curve,make curve for start step and end step.