Help with the XYZ pad in Editor Mode.

Hi!
Im trying to map an XYZ pad to an Auto Filter, so that when I press over the pad, the device will be turned on, and moving the pad I can move the parameters, but letting go will deactivate the device.
I was hoping the Z parameter could work as an activator, but it does nothing. What exactly does the Z parameter do in a two dimensional pad? Is it maybe the depth if you have a pressure sensitive Ipad? I hope not as Im just using an Ipad air with no pressure sensitivity.
Many thanks!

Hi,

the z parameter acts like a momentary button. touching the padd will activate the parameter (set value to 1), as far as the touch ended the parameter will deactivate.

best