G'day hedleogh,
John, on a technicality, the route does not use them. They are provided for your use, as an alternative visual source, to make it easier to create the route. However, there are two techniques to using them so that they can function in this manner. The first of these is to raise and lower them, using the standard Surveyor Object Raise/Lower methods so that they appear and disappear across the terrain, in a manner that allows you to cover/uncover the aspect of the route building that is the focus of the work session, or to use the [F9] function to set the wireframe mode in Surveyor so that all the UTM maps are visible. Toward this end, I would suggest that you download and install the *.cdp file recommended in
this thread to make the task of seeing them easier...
Jerker {:)}