If this registry entry is set to 0 (False), the software selects the 2D option in the Construct Circle dialog box. If this registry entry is set to 1 (True), the software selects the 3D option in the Construct Circle dialog box.
Entry Name: Constructed Circle - 2D3D
Entry Type: Whole number - either the default value 0 (False) to select the 2D option in the Construct Circle dialog box, or 1 (True) to select the 3D option.