Fan lacing, so called because laces are fanned out to create a series of nested vees, is a very fancy way of actually simplifying the process of tightening your corset.
Vintage Antique 1930/40s Jacquard Side Fan Lace Up Girdle Corset Camp Sz S-M
Corsets with Fan-Lacing – Lucy's Corsetry
Fan Lacing Slides - 5-Hole (By the Pair) from CorsetMakingSupplies.com
Fan Lacing: A Corset Love Letter
Corsets with Fan-Lacing – Lucy's Corsetry
Fan Lacing - All about corset making and corsetry components
How To Fan Lace Any Corset
Fun with Fan Lacing: The Why & How of This Intricate Corset Lacing
Fan lacing tutorial
How to style lace, according to 8 Australian creatives
How to Make Regency Period Fan Lacing - By Sidney Eileen