Let's say you have a structured outline.
Let's say the first three levels are topic/sub-topics and levels beyond that contain large text blocks with information.
Let's say you want to search for particular topics. A problem is that the key words for one topic may appear in the text portions of many unrelated topics.
so, try this:
Using slang extension (of course) set up a filter:
folder = Mr./Mrs. (or any text folder in the file)
EQUALS
++:: ITL < 3
save as named filter such as Level < 3
turn on the filter.
you'll notice nothing happens to your view.
all your items are in the view as before, even though the filter is activated.
but now try this:
in the quick search box, set to Filter, and enter some search term...
you'll notice that the term only matches if it is contained in the first 2 sub levels of any item.
Cool!