Regarding potentially improving the SnagIt app, suggestion for SnagIt developers:
have SnagIt fetch the web page's multiple scroll areas from the HTML DOM, figure out which one is largest, and scroll that particular panel ?
I think it would be a very useful (and hopefully simple) add-on to the "scroll a web page" capture feature. worst case it doesn't work, for which the backup is panoramic capture.
potentially, could also ask the user to select "which scrollable area to capture".
I'm a developer working with Google's Firebase console often, and it has both a left menu, as well as "main" right side which I often want to scroll-capture.
This seems like a very common case with multi-section web pages -- small menu section, and a "main" section for the content which is most likely what needs to be scrolled and captured.