Sony Alpha 7R IV Operating Instructions Manual page 449

Help Guide
Interchangeable Lens Digital Camera
ILCE-7RM4A
α7RIV
Write Serial Number
Writes the camera's serial number to the Exif data when shooting still images.
MENU → (Setup) → [Write Serial Number] → desired setting.
1
Menu item details
On:
Writes the camera's serial number to the Exif data for the image.
Off:
Does not write the camera's serial number to the Exif data for the image.
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