What is this button for?
At first guess would be ISO, since the right arrow corresponds to ISO on my K200D (under the Fn menu).
The other 3 are similar, with UP being drive/timer mode, DOWN being flash mode and LEFT is white balance.
This is consistent with the K-m, although that has a printed “ISO”.
Not sure why they’d replace ISO with an icon, though, if that’s what it is.
Ricehigh’s specs say:
“With the Four Ways / “OK” Buttons: WB, Flash, Drive and Colour Mode / AF Point Selection Activation”
As I am missing it, I hope it will be the DOF-preview button.