G21: Set Units to Millimeters G28: Home G29: Mesh bed probe G30: Single Z-Probe G31: Set or Report Current Probe status G32: Run bed.g macro G38.2: Straight Probe G38.3: Straight Probe G38.4: Straight Probe G38.5: Straight Probe G53: Use machine coordinates G54: Select coordinate...
A mesh taken when the printer is relatively cold, ideally after a short heatsoak (~10 minutes) from ambient temperature, and the temperature it was taken at (measured at the thermistor you intend to use, see point 1). Name that one "COLDx.x", where "x.x" is the temp, e.g. "CO...