Composition - Minolta Dynax 7xi Instruction Manual

Composition

In both horizontal and vertical mode, the AF brackets should be regarded as
reference area for positioning your subject within the frame. In horizontal
mode, the brackets follow the "Rule of Thirds," a common rule in
photographic composition which states that the important components of a
picture should be placed near to the intersections of the lines which divide
the frame into thirds both horizontally and vertically. The horizontal-mode AF
brackets lie on those intersection points.
88