Label the slope of an alignment (active profile) in plan view

We have some curb ramps that have been designed by using alignments with active profiles.  For the plan production, it would be great if we could use the annotation groups and/or "place label" tool to click on the alignment and then place text indicating the percent slope, oriented parallel to the element. It would also be great if it placed an arrow indicating the direction of slope.  It seems like this is possible, but all my experimentation has come up empty.  Any help is greatly appreciated. 

(OpenRoads Designer CONNECT Edition 10.9)

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