How do I selecting a different alignment with Civil Accudraw?

I have a file with 3 alignments created in OpenRoads. I am using Civil Accudraw to give me the STA. and Offset at any location on the project (checking the location of a surveyed culvert). When I begin the process I activate Civil Accudraw and press 'o' to set the origin and I get the heads up readout of the STA. & o/s for that alignment.

I can't figure out how to select a different alignment, like a side road, in that same file to get that alignment's stationing. 

If there is a better way to get the STA. o/s read out let me know. I am used to Plan Preparation > Plan View Labeling in GeoPAK. 

Thanks,

Dan