When this option is selected the current workplane (UCS) will automatically switch to the workplane of the selected 3D object.
This allows for easier control under some node editing situations.
You can find any tool by the Menu Structure HERE: https://turbocaddoc.atlassian.net/wiki/display/TC21UG/Menu+Structure
You can find the menu location of any tool by name HERE: https://turbocaddoc.atlassian.net/wiki/display/TC21UG/Tools+Mapped+to+Menus
When this option is selected the current workplane (UCS) will automatically switch to the workplane of the selected 3D object.
This allows for easier control under some node editing situations.