Marlin "Tune->Bed Z" vs "Tune->Babystep Z" vs Z Offset?
- Tune -> Bed Z
Per description in this table, this refers to the Mesh Bed Leveling process. It allows to modify all saved mesh z-offsets by the given amount.
- Tune -> Babystep Z
This just instructs the motor to move the given amount, once, without changing any parameters.
- Control -> Motion -> Z Offset
Here we are talking about the offset of a z probe (e.g. BL-Touch) from the nozzle.