Unknown function on 5DII

[engardeknave]

This is on the 5D MKII.

Press the ISO button, and then you can adjust the ISO with the top rolling dial. However, after pressing the ISO button there is also a visible exposure compensation indicator, which can be adjusted with the quick control dial. It is not exposure compensation, though. I can't figure out what it does.

[1%]

You could post a screen shot...

[engardeknave]

This is on the top display and through the viewfinder. Just press the ISO button and you can see what I'm talking about (unless there's some setting that's making it happen).

This has nothing to do with ML, incidentally. That's why I posted it here.

[engardeknave]

It's flash compensation. Mystery solved.