In "Catamaran Sailing From Start to Finish", they say that when sailing to weather you can sail too close to the wind - "pinching" and it is the fastest course to sail a little off the wind - "in the groove" without falling off too much - "footing". But in another part of the book it says that when you are sailing closehauled and you are sheeted in as far as you can go, to point up until the jib starts to luff and then fall off until it fills in and this is the correct course for sailing hard to weather. My question is: Following the second method, when the jib fills in, are you now "pinching" or "in the groove"?
As mentioned previously, I'm relatively new to sailing, so I'm sorry if the answer is obvious.