Opens up a nonstandard Tracking window, set to only show "Harvestables". The list will be filled with harvest nodes, collection !'s and ?'s, and some quest nodes show up too (including the elusive An Eye for Power color shards).
Once you select one, and press ok, the window will close and you will get a glowy waypoint trail leading you to your choice
EQ2i credits this article at Census for the info in this article. the last update on Census for this item was: Wed, 13 Dec 2017 15:53:29 +0000