It would incredibly useful if in the command line options for the evaluatePT command, you could specify which part of the coordinates to display. For example, just evaluating the z coordinate. As a landscape architect I am constantly using the evaluatePT command to confirm elevations. Though I have created my own workaround in grasshopper, I would love a native tool that generates a text dot of the just the z-value upon click.
Hi Kev - see if this quick and dirty script helps at all. World coordinates only for now.
PointLabeler.py (1.6 KB)
To use the Python script use RunPythonScript, or a macro:
_-RunPythonScript "Full path to py file inside double-quotes"
-Pascal
A scripted tool can do that directly in Rhino without the need to go through GH. Here is one I wrote for another client a couple of weeks ago.
LabelPtZHtWDot.py (286 Bytes)
Hmm, too slow… 
wow you all are awesome, these are great!!! I should have asked earlier 
thanks!