PS is there a way to trap such event for “a” or a “specific type of” view? I am using 2 types of views, which are attached to 2 different types of sequences. I would like to trap activate/deactivate only for one type of view/sequence. Currently, I am associating these sequences only with the “standard” viewer. Should I derive the standard viewer and associate a specific viewer with each of my sequence types so that it will be easier to test the type of view that is selected / unselected?