[Closed] Help with Arc Rotate Sub-Object

I’ve searched through the forums and Maxscript reference, but I can’t seem to find any help with this. Can anyone tell me what is happening inside Max whenever I change the Arc Rotate button from its default to “Arc Rotate Sub-Object”? I’d like to develop a script that would automatically change between these two depending on whether or not I have a sub-object selection. Furthermore, is there a way to bypass activating Arc Rotate mode, and simply change way that the camera rotates?