Editing Sail components (section)

===Corners===
[[File:Schema-genois-enrouleur.jpg|thumb|[[Genoa jib]], showing reinforcement and attachment points:<br>
1. Head 2. Reinforcement 3. Luff <br>4. Leech 5. Anti-UV covering <br>6. Headfoil attachment 7. Panel(s) <br>8. Telltales 9. Reinforcement <br>10. Tack 11. Leech control 12. Clew <br>13. Foot control 14. Foot <br>15. Furling marks]]
The names of corners of sails vary, depending on shape and symmetry.

*''Head'' {{anchor|Head (corner)}}– In a triangular sail, the corner where the luff and the leech connect is called the ''head''.{{sfn|Jobson|2008|page=208}}<ref name="SAIL Magazine 101"/> On a square sail, the top corners are ''head cringles'', where there are grommets, called [[cringle]]s.<ref name = Knight>
{{cite book
 | last = Knight
 | first = Austin N.
 | title = Modern Seamanship
 | publisher = D. van Nostrand Company
 | edition = 8
 | date = 1921
 | location = New York
 | pages = [https://archive.org/details/modernseamanshi00kniggoog/page/n850 831]
 | url = https://archive.org/details/modernseamanshi00kniggoog}}</ref>

*''Peak '' {{anchor|Peak}}– On a quadrilateral sail, the ''peak'' is the upper aft corner of the sail, at the top end of a gaff, a sprit or other spar. 
*''Throat'' {{anchor|Throat}}– On a quadrilateral sail, the ''throat'' is the upper forward corner of the sail, at the bottom end of a gaff or other spar.<ref>{{cite book |last1=Underhill |first1=Harold |title=Sailing Ship Rigs and Rigging |date=1938 |publisher=Brown, Son and Ferguson |location=Glasgow |page=114 |edition=Second, 1958 |chapter=Glossary}}</ref> Gaff-rigged sails, and certain similar rigs, employ two ''[[halyard]]s'' to raise the sails: the ''[[throat halyard]]'' raises the forward, throat end of the gaff, while the ''[[peak halyard]]'' raises the aft, peak end.{{sfn|King|Hattendorf|Estes|2000|page=429}}
*''Clew'' {{anchor|Clew}}–  The corner where the leech and foot connect is called the ''clew'' on a fore-and-aft sail. On a jib, the sheet is connected to the clew; on a mainsail, the sheet is connected to the boom (if present) near the clew.<ref name="SAIL Magazine 101" /> ''Clews'' are the lower two corners of a square sail. Square sails have ''[[sheet (sailing)|sheet]]s'' attached to their clews like triangular sails, but the sheets are used to pull the sail down to the yard below rather than to adjust the angle it makes with the wind.{{sfn|King|Hattendorf|Estes|2000|page=146}} The corner where the leech and the foot connect is called the ''clew''.<ref name="SAIL Magazine 101" /> In the case of a symmetrical [[spinnaker]], each of the lower corners of the sail is a clew.  However, under sail on a given tack, the corner to which the spinnaker sheet is attached is called the ''clew'', and the corner attached to the spinnaker pole is referred to as the ''tack''. {{sfn|King|Hattendorf|Estes|2000|page=146}}
*''Tack'' {{anchor|Tack}}– The [[Tack (sailing)|tack]] is the corner on a fore-and-aft sail where the luff and foot connect<ref name="SAIL Magazine 101" /> and, on a mainsail, is located where the boom and mast connect.<ref name="SAIL Magazine 101" /><ref name="SQRG">{{cite web |title=Sailing Quick Reference Guide |url=http://www.wyc.org/portals/0/forms-docs/seminars-tsang.pdf |website=Wayzata Yacht Club |access-date=4 October 2016}}</ref> On a square sail underway, the tack is the windward clew and also the line holding down that corner.{{sfn|King|Hattendorf|Estes|2000|page=416}}