First the host shows absolute positions, so G92 should not change coordinates.
Red coordinates means no homing occured so value may be incorrect. This also allows to go below z=0 which is prevented when coordinates are known.
If you are at home and firmware things the same you can send @isathome and host will set itself to origin.
You can use one of the 5 script buttons to add the command to it.
M114 updates the coordinates as well from printer (not G114). Just not sure what it does with G92 gotten so far.
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