This feature (PR #6780) provides the ability to pause the probing process (e.g. during bed mesh calibration) while the heaters reach their target temperature again.
This is done through setting a ‘threshold’ attribute as part of the existing ‘[homing_heaters]’ tool.
Upon setting this threshold the probe/homing procedure will check to see if each heater is below TARGET_TEMPERATURE - THRESHOLD and if so it will display a message a pause until the heater has reheated.
There is also a new gcode command SET_HOMING_HEATERS that allows you to conveniently set and unset this via a macro.
Note that in order to work, this feature relies upon the bug fix in PR #6779.
Feel free to give me feedback and let me know if you like this feature 