Thank you Alfred & Manu... It appears that an important step ( not mentioned in the tutorial ) is that you have to select Current Layer and Below... very helpful, and frustrating not knowing that bit.
I am a newcomer to AP. It appears that a number of the tutorials are showing a "best case" scenario regarding the use of the tools and they certainly do not work as well as in the videos when presented with an image containing Alternative Facts :rolleyes: ( sorry ).
Additionally the presenter flies by with the speed of someone who is eminently familiar with the software / topic. Steps are skipped or given short shrift. Not like he is trying to teach someone who is unfamiliar.