Manual Setting in Go App "M.M"?

[Sunshine Ben]

Might not be the right forum for this question. Sorry in advance.
I am in my app, under manual setting for video and at the bottom is:
M.M -2

Does anyone know what this is? (it doesn't let me change it, although I am in Manual mode)

Thanks

 

[Sunshine Ben]

Might not be the right forum for this question. Sorry in advance.
I am in my app, under manual setting for video and at the bottom is:
M.M -2

Does anyone know what this is? (it doesn't let me change it, although I am in Manual mode)

Thanks

I am flying a Phantom 3 Pro if that is relevant