flexi-bot/docs/marlin/_gcode/M503.md

tag	title	brief	author	group	codes	notes	parameters	examples
m0503	Report Settings	Report all settings that may be saved to EEPROM.	thinkyhead	eeprom	M503	Does not require `EEPROM_SETTINGS`.	tag optional description values S true Detailed output flag. (`true` if omitted.) type flag tag optional since requires description values C true 2.0.9.3 CONFIGURATION_EMBEDDING Save the embedded configuration ZIP file to the SD Card or Flash Drive. type flag

Print a concise report of all runtime-configurable settings (in SRAM) to the host console. This command reports the active settings which may or may not be the same as those stored in the EEPROM.