Creating a shapefile from two existing shapefiles using the trace tool

[Hugh_Yellowstone]

I am trying to create a single shapefile with only one row of attributes from two existing shapefiles by tracing a hiking route to the summit of a mountain (first shapefile being traced), I then want to trace a second shapefile that incorporates the end of the first shapefile, then takes a different route down the mountain before returning to the path of the first shapefile all the way back to the trailhead.  I need the new shapefile that I have created of the route from the trailhead and back to only have one row of attributes and reflect the total mileage that I have hiked which would include the parts of the route that are duplicated (the beginning and ending segments).

I have traced the first shapefile (up) then saved my edits, then used the continue feature tool to trace the second shapefile (down), but it creates two row of attributes in the new shapefile instead of just one.  I have also tried to merge the attributes and it ends up cutting out mileage of the sections that I am duplicating.

I have easily done this before in ArcMap, but the functionality doesn't seem to work in ArcPro.

[Scott_Harris · Accepted solution]

@Hugh_Yellowstone 

It sounds like you need to work with M-enabled features. Once you have that, you will get this option in the Merge tool (more info)

ArcMap had similar behavior for M-enabled lines.

[Hugh_Yellowstone]

That did the trick.  Thanks.