@starcarbon said: I am using 2022. Thanks, I will try. Please update your forum profile. It's very out of date.

Thanks-worked!

@tig said: Have you also installed LibFredo6, which is needed to support it... Also install the SketchUcation toolset to get the latest licensing set up. Restart SketchUp after the installations to sync everything... Also note that this Extension appears in a Tools submenu... The toolbar associated with it should also be listed in the toolbars-dropdown... Thanks so much for taking the time to answer. I guess I missed the popup that said you have to restart to see the tool, something which I should have known. All is good now!

Thanks for your guidance. Yes, I have done that reading and get the concept. I guess it is a problem that I am working from CAD with contour lines that cross the property line (which is at 0). I trimmed all the contours at the property line, but when the "from contours" makes the terrain, it is just slightly different, not exactly the same shape for as built versus existing, when I look in plan view. So I guess I need to enter z values around the edge of the park/property line. I will keep working. Thanks.

Be sure to click only once on the surface, double click will select the edges too... see here