Geometry cut on the stair landing

[eness.gun]

how can I cut triangle geometry on the stair's landing ?

[ennujozlagam]

not possible? another way is to pick the stair > edit stair >  go to properties > change value of extend below riser base.

[eness.gun]

I changed parameter of extend below riser .
Result of this some chamfer detail created .
I think we can use model in place command in to revit to solve chamfer details on the landings.

[ennujozlagam]

can you share your stair file here so we can check? thanks