I might load into my D500 a custom memory bank that specifies a center-weighted metering parameter (say, CW 15mm). I like to be able to use my Fn1 button to switch to matrix. However, there's something weird about my D500 that does not occur on my D5:
I can go to Custom Settings> Controls>f1 and assign matrix metering to the Fn1 button. However, if I then press the Fn1 button, it appears to be unassigned. If I go back to f1 and assign the grid display to the Fn1 button, I get a message that says "No function assigned to Fn1 + Command Dial." It then assigns the grid display to the Fn1 button.
Now, if I go back to f1 and reassign matrix metering to the Fn1 button, it works.
I think the phrase is "going around the block to get next door." Like I said, that's true of the D500 but the problem does not occur on the D5. I can live with it, but, being compulsive-obsessive, I would love to know why it does that. Anyone?