Where the steps are, so the tour can route around them.
A visitor who uses a wheelchair, or is pushing a stroller, asks the tour for a step-free route. The tour walks them around every place you have marked here.
This screen is the record of where the steps are. It is short by design: two marks, and the routing does the rest.
Everything you record here is used by the tour's own routing, the same routing that answers Navigate for everybody else. You are not maintaining a separate accessible map.
Use this when the place itself cannot be reached without steps and there is no other way in. A shop up three steps with no ramp.
The tour then stops offering that place on a step-free route, rather than walking somebody to a door they cannot get through.
Reachable again on its row takes the mark off.
Use this when the path has steps in it but both ends are fine by another route. A stairway between two streets, a flight down to a riverwalk.
The tour then avoids that stretch on a step-free route and goes the long way round, which is exactly what somebody pushing a stroller wants it to do.
No steps on its row takes the mark off.
Nobody sits down and records every step in a downtown. Mark them as you notice them: after a walk, when somebody tells you, when a shop puts a ramp in.
Partial is useful. A tour that knows about six flights of steps routes better than one that knows about none, and nothing here has to be complete to be worth having.