Pressing the <> button lights up the AF points that are cross-type AF points for high-precision autofocusing. The blinking AF points are horizontal-line sensitive
When you press the <S> button, the top LCD panel displays the following:
61-point automatic selection AF and Zone AF (manual selection of zone):
Single-point Spot AF, Single-point AF, and AF point expansion:
SEL
(Center)/SEL AF (Off-center)
With [AF5: Manual AF pt. selec. pattern], you can set either [Stops at AF area edges] or [Continuous]