Board Thread:Policies/@comment-867021-20130305115037/@comment-3406131-20140501172646

Most of the time, the characters who appears everywhere are on different and unrelated story arcs.

If they appear in an issue of a series, then in an issue of another series, and those issues are linked, then here the arrows are useful. In other cases, the reader has just to follow the series.

Having arrows highlight that change of series (or a distance in the editorial releasing), and having no arrows indicates that there is only to follow the series.