In 11.6 I remember using right click on mouse to reveal 'limits extent' which done exactly what you are asking for. Why has this been taken away in version 12! or is it located somewhere else?
It was a very handy function to locate glabs & slabs outside drawing border.
many thanks Guys, I've created a list through the list/collections - selection method, queried 'q nam q ref q desc' in the actions dialog a found the offending text.
Thanks again