Can this utility be used to save a site by what _I_ navigate, instead of using
a blunt "whole site", automatic approach?
In other words, I wish to save ONLY the pages I click to and be able to append
any new pages without having to start all over whenever pages are added or
previous pages are modified (unless I want to).

Is this possible with HTTrack? Downloading whole sites is an enormous waste
considering that most of the links are irrelevant to the subject.