Originally posted by jaikumarr18 Also I use focus select mode to choose my focus point so that i can focus on the eye of the subject during portrait.
One quick suggestion:
By far the easiest and quickest way to use autofocus is to use only the center point. For portraits, you focus on the eye using the center point, keep the button half pressed to lock focus while you recompose the shot, then finish by pressing the button all the way.
Even better is to use back button focus in combination with AF.C mode (still with only the center focus point), but that's just a more advanced application of the same technique. I'd hold off on learning that until you're comfortable with the above method.
The only time where selectable focus points make sense is when the camera is on a tripod. In that situation I'm manually focusing anyway, so I never even use selectable focus points. But, they do minimize the hassle of recomposing on a tripod with autofocus.