Theoretical question about z axis

I’m planning on implementing a motorized Z table into my k40, with a z probe. Now, I understand that pressing the focus z button will just execute the gcode command so that my smoothie firmware on my laserboard homes the z axis to the probe.

If I then enter a material thickness, and set it to “line cut mode”, will it change the z offset to be in the middle of my material?

And if I am doing a job that involves both a scan and a line, will it change the z offset back to the top of the material for the scan, and in the middle of the material for a line? Ensuring that the focus point is correct at all times.

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