Dear Lars,
I used this option recently, it is very handy. But I have to annotate a longitudinal profile (which is a autocad 2d polyline) at 20 m chainage/station interval. As the option is written for picking first and lost point to annotate slope over the line, I manually annotated the whole longitudinal profile at 20 m interval. In addition to the present option, If select polyline object option is added to annotate between vertices; it will be much more handy.
Therefore, I request you to release an update to incorporate this command.
Advance Thanks
M V Rao