Hi @lavanya,
I’ve posted exactly the same question. Would be nice if we could all vote up that posting to get some official answer. I’m not sure whether the way I calculated it there is the right one. Doesn’t look to me like that as the axis offset is prefixed with an underscore and thus was intended to use only as a private property, so it looks ugly and weird to me and I also wondered whether there is no “plotly way” of getting those coordinates.