Is it possible to use the probe for X, Y, Z from any corner of your work piece? I have a design written with (zero, zero) as the top left corner. When I place the probe in the top left, it still acts like it is in the bottom left corner. I could not find anything in the settings about how to switch corners.
To the best of my knowledge, not natively.
However Triquetra (manufacturer of Onefinity probe) has a Toolbox Companion that offers more probing options.
Sadly it’s a Windows only tool 
Many of the cam packages (for example, all flavors of vectric/vcarve) allow you to pick any corner for 0,0 and adjust the toolpath coordinates accordingly.