Apparently, I accidentally reset something and I have no idea what it was. As a result, the inspector bar is showing cumulative rotation adjustments since object was originally created. In other words, if I create an object - 2D or 3D - then
Edit / rotate it 20 degrees on Z,
Release my control on that object,
Subsequently select that object, the inspector bar starts off displaying 20 degree rotation on Z.
I don't want it to do that and I have no idea what I did to cause it.
Your rescue will be greatly appreciated!