Trust me, that's not the problem.
The instructions say
If we look at my screenshot ...
1. I have a Flat Region selected (upper left of plan.) I have opened the object. I am therefore viewing the "Flat Region Specification" dialog.
2. On the left of the dialog, I have: "Polyline, Selected Line, Line Style, and Fill Style" panel options.
ergo, there is no "elevation panel"
The tutorial I'm following for creating a stepped terraced or stepped terrain was published July of 2015 and is applicable to Home Designer Pro. Ergo, it should be applicable to later versions. (See the next screen shot.)
I have even created a blank file, added a terrain perimeter, added a flat region, and then opened the flat region to attempt to edit it's elevation.
Still no elevation option.
And yet, when I add elevation lines, they provide the appropriate option
Somehow, my program is not enabling elevation "objects," specifically flat regions, to edit their elevation.
I'm hoping someone has seen this before, and/or knows a work around for terraced regions.
Thank you.