Changing the size of the focus frame?
I'm slightly embarrassed to have ask this question. I feel it's something I really ought to know. But here goes anyway. Reading through the X-T1 manual again I saw the instructions on how to change the size of the focus frame. Then it occurred to me that there was no explanation in the manual of why I would want to. What does changing the size of the focus frame do? So I tried to Google it, but my Google Fu failed me. I couldn't find any pages discussing the result of changing the size. So I'm posting my question here and hoping one of the many very knowledgeable people on the forum will provide me with an explanation.