The 4 + 4 + 2 method is a fingerprint capture technique that involves taking flat impressions of an individual's four fingers on each hand, followed by their two thumbs.
Four fingers meaning capturing slap , which have four fingers like in screenshot
Set the missing finger and SDK will skip that finger and capture and segment the remaining fingers.
You can set the minimum number of fingers and checkbox for missing fingers before capturing the fingerprint slap
Like in Left Four Finger, missing finger is left little and set the minimum fingers are 3 (Left Index, Left Middle, Left Ring )
And capture the fingerprint
Same way capture the two thumbs and Right Four Fingers select the finger checkbox missing and select the minimum finger of that capture mode and capture the fingerprints.