Sony A7RIII ILCE-7RM3A Operating Instructions Manual page 623

Help Guide
Interchangeable Lens Digital Camera
ILCE-7RM3A
α7RIII
MOVIE Button
Sets whether or not to activate the MOVIE (Movie) button.
MENU → (Camera Settings2) → [MOVIE Button] → desired setting.
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Menu item details
Always:
Starts movie recording when you press the MOVIE button in any mode.
Movie Mode Only:
Starts movie recording when you press the MOVIE button only if the shooting mode is set to [Movie] or [S&Q Motion]
mode.
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