There are plenty of meaningful questions that can be answered by focusing on one edge meaning at a time, though.
Call graphs (edge: this calls that), pert charts or dependency charts, (edge: this is required by that or this enables that), recipes (edge: do this before that), arguments/conclusions (edge: this premise combined with that premise implies or justifies that lemma), etc, etc. All of those are very useful to look at visually.
Call graphs (edge: this calls that), pert charts or dependency charts, (edge: this is required by that or this enables that), recipes (edge: do this before that), arguments/conclusions (edge: this premise combined with that premise implies or justifies that lemma), etc, etc. All of those are very useful to look at visually.