Z2 can you fix key?

I'm looking to get a new mixer and the Z2 looks pretty perfect for me. I'm currently still pure vinyl so I'm new to the functions you get using software and digital tracks. One thing I am interested in is the ability to fix the key of a record irrespective of changes I make to the tempo, and I can't see if I can do this using the Z2.
I can see that the Z2 does not have a key button/ knob on it, but can I fix the key/ set it on and off for each track through the software on the laptop still?
If I can, can I also assign a button on the Z2 so I can activate/ deactivate this feature quickly?
Sorry for the noob question, I realise I've been living in the past. All replied appreciated!

 

Sounds like you're speaking about Keylock. If I am correct, then yes, the Z2 is able to lock the key so it doesnt change when you adjust the tempo. This is a function within Traktor Pro.

 

Great, thanks! So impressed with the Z2. I took the plunge and bought it anyway. Just getting reacquainted with my vinyl before I fully connect it. Will look out for the key lock function.