To reference an individual on a school photo, use the convention [photo year(no)], [row], [column]. Brackets not essential, commas are.
Most years are in several parts, with some edge overlap, entered in L->R sequence.
Use F for full year photos.
Rows – count from bottom and enter as a letter.
Columns – count from left and enter as a number, or occasionally a range of numbers (as 17-19 ) where the mid number is the individual required.
For example to locate me try – 1954(3), A, 7 : 1958(4), I, 7 : 1960 (F), C, 19 .