Sony ECM-M1 Compact Camera-Mount Digital Shotgun Microphone - Manual (Page 38)

HVL-F60RM/HVL-F60RM2: If you assign “TTL/M SWITCH” to a button of your choice, you can switch the flash mode between TTL flash mode and
MANUAL flash mode simply with the button.
Related Topic
TTL flash photography <TTL>
Customizing the button assignment <CUSTOM KEY>
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