Concur with neuro, there are a multitude of options with this model. Just remember, in AI Servo, single point AF and single point spot AF cannot be used in Cases 5 and 6! However, Cases 2 and 4 are good choices when single AF points are needed in AI Servo. I have found Case 6 with all 61 points selected, works very well for me when shooting BIF with either my 100-400 or 70-300L. Also, selecting the 9 center points works well in all AI Servo Case choices.