📝 M851 applies later (#583)

Co-authored-by: Scott Lahteine <[email protected]>

_gcode/M851.md

@@ -95,7 +95,9 @@ examples:
 
 Set the XYZ distance from the nozzle to the probe trigger-point. These offsets are required for the firmware to know how to probe the bed and where probed points are in relation to the nozzle, and _vice-versa_.
 
-The easiest way to get the Z offset value (assuming your homed Z = 0.0) is to:
+For LCDs that support MarlinUI you can enable `PROBE_OFFSET_WIZARD` and follow a guided process to set the probe Z offset.
+
+If the Probe Wizard is unavailable, the easiest way to get the Z offset value (assuming your homed Z = 0.0) is to:
   - Home the Z axis.
   - Raise Z and deploy the probe.
   - Move Z down slowly until the probe triggers.
@@ -105,4 +107,4 @@ The easiest way to get the Z offset value (assuming your homed Z = 0.0) is to:
 
 For the X and Y offsets you have to measure the distance with a ruler or caliper.
 
-For LCDs that support MarlinUI you can enable `PROBE_OFFSET_WIZARD` and follow a guided process to set the probe Z offset.
+The probe offsets don't modify the current coordinate system or existing leveling data in any way, but will apply on subsequent uses of the probe.