Is there a auto mask shortcut key?

[Nealj121]

Is there a key to turn auto mask on and off? I am going thru some fine details in a photo and using a mask to touch up a building. So I am turning auto mask on and off when it doesnt pick up all the tiny pixels (most people prob dont see them but I am picky when it comes to details). 

If there is a key to just turn it off and on, easier than clicking it and off. 

[Rob_Cullen]

TBMK, Brush Auto-Mask-

In Lightroom-Mobile versions:  No.

In Lightroom-Desktop v5.1:   Not that I can find!  (IIRC There used to be a checkbox  at the base of Brush sliders- but now I cannot find even that!!)

In Lightroom-Classic :  Yes it is  keyboard [ A ]

[Nealj121]

Yeah I was worried there wasnt one. I searched but nothing came up and I had hoped someone knew a secret. 

And yeah its for desktop CC version. I wish auto mask was on the ipad version. 

Thanks for checking