You cant change the shape of the hull; but, you CAN change the shape of the sails — to accomplish better pointing, faster sailing, more power, etc. etc. etc.
Pointing ability also includes proper SHAPE of the sails and proper shaping can be accomplished by the usage of tell-tales.
One of the *very best* series of articles ever written on tell-tales can be found at: ArvelGentry.com
----> magazine articles ---->
---> A sequential series of 4 articles:
Checking Trim on the Wind, November 1973
Achieving Proper Balance, December 1973
Sailing to Windward, January 1974
Are You at Optimum Trim?, March 1974
Before you start with the above, TUNE YOUR RIG FIRST, as a sailboat with a too loose forestay (tension controlled by the backstay) will NEVER be able to point well. Aim for 15%+ backstay tension for sailing in 12-15kts of wind, etc. There are many internet 'articles' on rig tuning but be aware that the only 'valid' rig tune articles will be based on NUMBERS of % of rig tension - Youll need tension gage or equivalent --- or a good rigger who also races sailboats.
The reason for this is that a sailmaker when designing a jib/genoa EXPECTS that the forestay will be about 15%+ tension and if the actual forestay tension is less than that, the foresail wont be able to take on the DESIGNED shape and you get: so-called 'weather helm', boat skidding off to leeward, s-l-o-w boat and boat that aggressively heels but cant point !!!!!!