Thanks.
I was doing two things (in my post). You spoke to only one of them.
The first thing was: asking whether the search unit can be a screen of displayed text. You have answered that question. Thank you. Your answer was: no.
The second thing was: maintaining that if the search unit cannot be a screen of displayed text, then that is bad.
So what about about that second point? If in a screen of text - say the one that I attached - I wish to find a particular word or phrase, why should I have to search the whole book? True, the search will reveal whether the screen contains the sought string, but if I press F3 to see whether the screen contains another match, then it might well be that off I go, jarringly, to another page.
So, what we have here is a feature request.
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