The vast majority of boats sailing today are single headsail rigged with the headsail on a foil that the headsail can be reefed when it blows up without any member of the crew having to leave the cocpit. This has practically revolutionized sailing. No longer is it necessary to have a couple of young tigers on board that are willing and able to work on the foredeck in heavy weather changing hanked on headsails.
Now the geriatric ma and pa can sail a 45’ boat with little problem. It is possible to reef a headsail and preserve its shape if the headsail sheet is moved forward so that it is in the correct position for the reefed headsail. To take the guess work out of as to where to move the staysail lead, most sailmakers will put two stripes on the luff of the sail parallel to the luff. (see note side bar) The smart skipper will in moderate weather reef the headsail to the first stripe, ascertain and note the correct sheet lead then reef it to the second strip and do the same.
When reefing to the second stripe it is essential to not only move the sheet lead forward but also inboard as if the lead is left out on the rail cap once the lead is moved forward enough to make the sail efficient when reefed to the second stripe, making it into a G3 the sheet lead to the rail cap is too wide much wider than the normal 10 degree sheeting angle .