Suggestion: include Hearth Rate graph

[routeconverter]

Please have a look at the latest prerelease: I allows to select heartbeat for the Y-Axis of the profile view. Your file is very helpful to see it ;-)

[V.V.V.]

It works fine: the profile view and the tooltip with data over the point in the profile view.
I have tested it with several files, with bicycle and walking data. Even if there is no heartbeat data, the view is empty without problems.
Thank you very much.